“Clearly," said Arthur,"you're an idiot- but you're our kind of idiot. Come on.” ― Markus Zusak, The Book Thief
I also find it dull much of the time. I haven't friended my kids, but they are required to show me their pages with no advance notice. So far, they've shown themselves to be trustworthy, but I don't take anything for granted.
My daughter finds FB a burden but does use it to keep up with friends in other high schools. One of her buddies got shipped off to boarding school, so FB is their main connection right now. My son just uses it to chat with his nerdy gaming friends.