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The "Facebook Subpoena/Search Warrant Guidelines" from the Cryptome site are dated 2008, so there's a chance they've been superseded. The document spells out how law enforcement and intelligence agenices should go about requesting information about Facebook users, and details what information is turned over. Following is what Facebook will turn over about you, taken verbatim from the guide: Types of Information Available User Neoprint The Neoprint is an expanded view of a given user profile. A request should specify that they are requesting a “Neoprint of used Id XXXXXX”. User Photoprint The Photoprint is a compilation of all photos uploaded by the user that have not been deleted, along with all photos uploaded by any user which have the requested user tagged in them. A request should specify that they are requesting a “Photoprint of user Id XXXXXX”. User Contact Info All user contact information input by the user and not subsequently deleted by the user is available, regardless of whether it is visible in their profile. This information may include the following: Name Birth date Contact e-mail address(s) Physical address City State Zip Phone Cell Work phone Screen name (usually for AOL Messenger/iChat) Website With the exception of contact e-mail and activated mobile numbers, Facebook validates none of this information. A request should specify that they are requesting "Contact information of user specified by [some other piece of contact information]". No historical data is retained. Group Contact Info Where a group is known, we will provide a list of users currently registered in a group. We will also provide a PDF of the current status of the group profile page. A request should specify that they are requesting "Contact information for group XXXXXX". No historical data is retained. IP Logs IP logs can be produced for a given user ID or IP address. A request should specify that they are requesting the "IP log of user Id XXXXXX" or "IP log of IP address xxx.xxx.xxx.xxx". The log contains the following information: * Script – script executed. For instance, a profile view of the URL http://www.facebook.com/profile.php?id=29445421 would populate script with "profile.php" * Scriptget – additional information passed to the script. In the above example, scriptget would contain "id=29445421" * Userid – The Facebook user id of the account active for the request * View time – date of execution in Pacific Time * IP – source IP address IP log data is generally retained for 90 days from present date. However, this data source is under active and major redevelopment and data may be retained for a longer or shorter period. Special Requests The Facebook Security Team may be able to retrieve specific information not addressed in the general categories above. Please contact Facebook if you have a specific investigative need prior to issuing a subpoena or warrant.

Comcast The Comcast document is labeled "Comcast Cable Law Enforcement Handbook," and is dated 2007, so there's a possibility that it, too, has been superseded. As with the other documents, it explains how law enforcement agenices can get information, and details what information is available. There's a great deal of detail in the 35-page document, which describes what Internet, phone, and television information will be turned over. For example, here's the IP information it will make available: Comcast currently maintains Internet Protocol address log files for a period of 180 days. If Comcast is asked to respond for information relating to an incident that occurred beyond this period, we will not have responsive information and can not fulfill a legal request. (Comcast can process and respond to preservation requests as outlined below in this Handbook.) As expected, Comcast will also turn over the emails, including attachments, of those who use Comcast's email service, but "In cases involving another entity’s email service or account, Comcast would not have any access to or ability to access customer email in response to a legal request." Information Comcast turns over to law enforcement agencies varies according to the request. For example, a grand jury subpoena will yield more information than a judicial summons, as you can see in the excerpt below. Comcast notes, though, that this is just a sample, and that "Each request is evaluated and reviewed on a case by case basis in light of any special procedural or legal requirements and applicable laws." So the examples "are for illustration only."

For those who worry about privacy, though, all of this information is small potatoes. The real worry is about the use of what are called pen registers or trap-and-trace devices, which essentially capture all of your Internet activity --- the Web sites you visits, the emails you send and receive, IM traffic, downloads, and so on. Here's what the document says about them: Pen Register / Trap and Trace Device Title 18 U.S.C. § 3123 provides a mechanism for authorizing and approving the installation and use of a pen register or a trap and trace device pursuant to court order. All orders must be coordinated prior to submission to Comcast. Law enforcement will be asked to agree to reimburse Comcast's reasonable costs incurred to purchase and/or install and monitor necessary equipment. See "Reimbursement," below.

"People tend to conform their factual beliefs to ones that are consistent with their cultural outlook, their world view," Braman says. The Cultural Cognition Project has conducted several experiments to back that up. Participants in these experiments are asked to describe their cultural beliefs. Some embrace new technology, authority and free enterprise. They are labeled the "individualistic" group. Others are suspicious of authority or of commerce and industry. Braman calls them "communitarians." In one experiment, Braman queried these subjects about something unfamiliar to them: nanotechnology — new research into tiny, molecule-sized objects that could lead to novel products. "These two groups start to polarize as soon as you start to describe some of the potential benefits and harms," Braman says. The individualists tended to like nanotechnology. The communitarians generally viewed it as dangerous. Both groups made their decisions based on the same information. "It doesn't matter whether you show them negative or positive information, they reject the information that is contrary to what they would like to believe, and they glom onto the positive information," Braman says.

"Basically the reason that people react in a close-minded way to information is that the implications of it threaten their values," says Dan Kahan, a law professor at Yale University and a member of The Cultural Cognition Project. Kahan says people test new information against their preexisting view of how the world should work. "If the implication, the outcome, can affirm your values, you think about it in a much more open-minded way," he says. And if the information doesn't, you tend to reject it. In another experiment, people read a United Nations study about the dangers of global warming. Then the researchers told the participants that the solution to global warming is to regulate industrial pollution. Many in the individualistic group then rejected the climate science. But when more nuclear power was offered as the solution, says Braman, "they said, you know, it turns out global warming is a serious problem."And for the communitarians, climate danger seemed less serious if the only solution was more nuclear power.

Statistical validation of results, as Shaffer described it, simply involves testing the null hypothesis: that the pattern you detect in your data occurs at random. If you can reject the null hypothesis—and science and medicine have settled on rejecting it when there's only a five percent or less chance that it occurred at random—then you accept that your actual finding is significant. The problem now is that we're rapidly expanding our ability to do tests. Various speakers pointed to data sources as diverse as gene expression chips and the Sloan Digital Sky Survey, which provide tens of thousands of individual data points to analyze. At the same time, the growth of computing power has meant that we can ask many questions of these large data sets at once, and each one of these tests increases the prospects than an error will occur in a study; as Shaffer put it, "every decision increases your error prospects." She pointed out that dividing data into subgroups, which can often identify susceptible subpopulations, is also a decision, and increases the chances of a spurious error. Smaller populations are also more prone to random associations. In the end, Young noted, by the time you reach 61 tests, there's a 95 percent chance that you'll get a significant result at random. And, let's face it—researchers want to see a significant result, so there's a strong, unintentional bias towards trying different tests until something pops out. Young went on to describe a study, published in JAMA, that was a multiple testing train wreck: exposures to 275 chemicals were considered, 32 health outcomes were tracked, and 10 demographic variables were used as controls. That was about 8,800 different tests, and as many as 9 million ways of looking at the data once the demographics were considered.