Well mate, with a site this size its a certainty that many members will not be "who they seem". As JD said, keep it legal and there isn't a problem
If people stopped worrying about who is who and get on with having a good site, then there wouldn't all this crap, people on edge, slagging each other off etc..............
If you've done nowt wrong, posted nothing silly that will back fire on you, then why worry.
Let people copy and paste, print and send to who ever, so bloody what!!!!