S.R.
I'm not there yet with my kids, it'll be a long time, thank goodness. My friend went through this a couple of years ago with her 2 teenagers. She had to change plans to unlimited texting because of a HUGE bill. When they approached her about FB or My Space she sat down with them and explained the importance of how to use it properly and to be careful with personal info, don't put it out there and only allow those you want to see it to have access. Do not let it be public. With that, she also told them the only way they could have an account is if she had access to it, log in or as a friend, so she didn't have to worry about it. They agreed and have used these sites appropriately.