I found this comment in a blog:
I do not have it with the critics of Facebook. I have just a little 'itchy for comments like this that for a paradox, give more importance to social than non-users do the same.
A social is never the complete truth and will only contain what I want, and only people that I consider to contain.
The decision to throw in everyone's just a subjective choice. No one points the gun. As usual it is more easy to shift responsibility for an event to a thing rather than one who has used it.
For the same reason, the new "personal network" Path exists because people can not restrain the number of contacts. It is foolish to choose a limited social network in friendships because you do not have the good sense not to click any request for affinity alike.