I guess I have a very different opinion of Facebook from the masses. I have several former classmates and friends that work at Facebook, and back in the day, my university was one of the first 15 schools on Facebook. I've been a member since 2004. Facebook as a company has obviously changed drastically from those days, but when I first joined, it wasn't the big Leviathan it is now, and I can understand the rapid evolution and massive expansion that happens to a tech startup, and all the consequences it brings. Give Zuck a break. He's not the devil.
Before there was Facebook I hated MySpace. After Facebook I'll probably hate whatever social networking site pops up next. I just don't like the concept so no matter who you are you'll have a hell of a time making a good one.
It's like asking someone to pick their favorite Nazi.
I personally never felt the need to participate in any of these social networks. On the other hand, I find it hard to hate something that you're entirely free to embrace or disregard as you like. In this sense, the Nazi comparison is somewhat flawed.