I won't allow my kids to have Facebook accounts. My daughter is 11 and wants one. My son is 7 and is, well, kinda clueless at this point.
I have nieces and nephews who are teenagers and "friends" on Facebook. It can be pretty disturbing to read some of the stuff they post. Nothing like what the article talks about, but stuff like how "wasted" they got the night before, and girl/boy issues. One of my nephew's friends have hacked into his Facebook account and posted some pretty lewd stuff.
Yeah Rog. You must control it as much as possible. But you're lucky - they are at a controllable age. A few more years and you're sitting on a problem. It's inevitable.What we can teach them now is to be discerning. To avoid the worst.One helluva problem.