The requirement of a signed release doesn't seem to apply to user-posted content. The requirement applies to sites considered to be the producer of the content

The requirement of a signed release doesn't seem to apply to user-posted content. The requirement applies to sites considered to be the producer of the content. For example, if this requirement were enforceable against user-posted content, online adult personals wouldn't be legal. A little quick Googling finds me the Stranger's adult personals disclaimer: http://thestranger.selectalternatives.com/gyrobase/adult http://thestranger.selectalternatives.com/gyrobase/adult. According to 18 USC section 2257, you aren't considered a producer if you are limited to things like photo or film processing, digitization, distribution, an ISP, etc. (http://www.law.cornell.edu/uscode/text/18/2257 http://www.law.cornell.edu/uscode/text/18/2257). Similarly, IANAL, but it seems that adult sites have a certain amount of protection for user-posted content similar to YouTube's copyright safe harbor.