The constant "Facebook is evil" makes no sense to me, as it's the easiest way to keep in touch with a wide variety of people around the world. If I deleted my Facebook, I'd lose touch with dozens of people worldwide. Could I email them? Sure, but that's broken and impersonal.
How much more personal can you get than one person writing a message specifically to one other person?
Email is extremely cold and impersonal compared to Facebook chat. Most "normal" people don't use email outside of business or more specific uses.
With email there is the assumption that the relationship will be more intermittent and flippant.
You have opened a lifetime of impersonal comments directed at a disinterested crowd. By its very nature, it won't be personal.
"I'm having beans for dinner."
"Beans a legend lol"
"I'm getting divorced and I've told you and the other five hundred 'friends' here at the same time, in the same way"
What if you gained 20 pounds? Or lost your boyfriend to your close friend? What has normally be associated with the family is now associated with the village, and that adds a lot of stress to people's lives.
Another problem is the us versus them that this group has enforces on people like me. I think I'm a pretty cool person, but if we met, I wouldn't have a facebook account to share with you. Would that affect your opinion of me? Maybe not, but I've had people comment negatively to it, and have even read articles proclaiming it affecting people economically due to potential social expectations now set by employers.
To me, it's a destructive force and a tool. A real-time chatting/messaging service that connects to an address list. And a new social experiment leading people down a path of "true" social alienation and narcissism.
I don't doubt that some people can use the tool responsibly, but it also leaves much to be desired for.
I (as anyone who had traveled, I'm sure) have a lot of friends on Facebook whom I met on a trip. Maybe we only had a beer and hung out for 3 hours. But since we added each other on Facebook, we're able to keep in touch. I talk to foreign friends via Facebook all the time.
So instead of my buddy in Brazil that I met in NYC, you'd just be some random cool guy I knew once.
It gives a very biased impression on how life should be.