All they would really need is consent. If facebook wants to use a picture, then email that user asking for permission. There would likely be some people who don't wish to have a picture used, like if you were holding a beer and are under 21, but there are others who would be fine with it. This would be easier if they just paid people $20 for every picture they used, lots of consent and cheap ads.
Slashdot Mirror
All they would really need is consent. If facebook wants to use a picture, then email that user asking for permission. There would likely be some people who don't wish to have a picture used, like if you were holding a beer and are under 21, but there are others who would be fine with it. This would be easier if they just paid people $20 for every picture they used, lots of consent and cheap ads.