I have a facebook but with a second "unknown" email and a fake picture and name because I don't want to be asked by peoples I used to know a long time ago but have no more affinities with them if I can be their friends. Also, as I used to work in a summer camp, there is more than 2000-3000 peoples I used to know roaming around and I seriously do not want all of them to add me, especially as my bounds with them are very often limited in reality. Not that I want to be mean but still, I am very severe about life privacy and I won't open the whole thing to peoples I am estranged of now. I only add long time friends or meaningful peoples.
Those I dislike the most? Those playing 200000 applications, sending me constantly requests about it and where I have to fight 50 times a day the update of these applications, to me, these are a very dangerous breed of facebookers.