Taking advantage of Fair Use protections of copyright law, a problem the publishers are responsible for, not Creative Commons. This article is about a case of Open Access as rights - laundering and how expensive it can be to the owner.
No one can own a physical person, so why would that be different for fictional characters? This article argues how fictional characters should belong to the fans, and not the authors.
This article talks about copyright violations of a company to an individual. The company used a photographer's pictures for their benefit of making it used commercially for their profits. Just because it was posted on Twitter, a public domain, doesn't mean one can steal someone's products without permission. This is related to our copyright lecture of what not to use for commercial use without giving credit to the original owner of the product.