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很多时候，人（尤其是经理人）会太注重现有顾客，忽视潜在客户。人也会太注重用户能表达的需求（市场调查拿得到得），忽略用户不知道怎么表达的需求（需要靠创业的自觉来发掘的）

One of the most active threats we face today on the Internet is cyber-crime. Increasingly capable criminals are constantly developing more sophisticated means of profiting from online criminal activity. This paper demonstrates a growing, sophisticated technique called fast-flux service networks which we are seeing increasingly used in the wild. Fast-flux service networks are a network of compromised computer systems with public DNS records that are constantly changing, in some cases every few minutes. These constantly changing architectures make it much more difficult to track down criminal activities and shut down their operations.