Apparently nudity is not even required anymore for images to be considered child porn, so you're not even safe if you aggressively remove all images that most people would consider inappropriate.  From what I can tell, there really is no unambiguous line, and that's disturbing, because there's no way to keep a site "sanitized" against this sort of thing.<p>The upside is that I don't think there have yet been child porn charges brought against web service owners for things that their users have uploaded, since it's usually against the terms of service to upload such things and courts realize that owners of a web service can't be expected to police every piece of user-uploaded content.<p>And FWIW, I find this very appropriate for Hacker News: it is a disturbing legal trend specifically caused by people's reactions to new technologies, and you can bet that the people responsible for this push would love nothing more than to spread this type of thing to the Internet.  I don't think we should be too concerned that they'll succeed, because most normal people see the lunacy in all of this, but it's still worth keeping an eye on.