mack - 8:49 pm on Dec 18, 2012 (gmt 0)
So... User A doesn't really understand IP law, he is friends with user B and user B sends him a photo by email. User A uploads it to Instagram and company C buys the right to use it for a national advert. But user B is legaly the content creator.
I guess this will also be pushing the boundaries of "safe harbor"