That doesn’t meant that you can’t just not use Facebook. Social networks, in particular Facebook, have become a central part of social interaction. You can’t simply use another network, because they’re not interoperable. Your friends aren’t there, and you’ll be missing out.
I cant help thinking that as some point there needs to be an independent arbitration service that users or ex-users can appeal to in this sort of event, perhaps one a site's user base gets to a certain level. Other wise, how are facebook and co ever held to account in this respect? Can a Syrian protester sue facebook in Syria, or perhaps raise a fortune to sue in the US? How does it work?
Also, it is a bit ignorant and misplaced to suggest that slavery existed because people were just 'taking what they were given' and then link this to something as futile as a website.