I also checked out the Teen board before I let my child post there.
One of the things that I thought was good was that the board moves pretty slow. That way I could check out my child's posts, after, just to check about appropriateness and to make sure personal stuff wasn't being requested. or given.
I was glad to know that my child was concerned about safety too. My child created a pen name and added some years to age,as that looked safer,and left out all optional info,so no additional info can be found.
AS my child got older,we added MSN Messenger [an older version,we won't up date,not yet]as you can only talk to one person at a time and you are sent a request to add another person to your friends list and if you say no then they can't contact you. My child seems to be able to keep 2 conversations going on 2 messengers at a time though!!lol!!