Talk to your kids
You teach your kids to look both ways when crossing the street, and you discuss the dangers of talking to strangers, so why should their online behaviour be any different?
Tell them what to look out for, that they shouldn't chat with strangers and that if they see anything they don't like, they should tell you.
"Tell them not to share specific details about their physical location and be careful about accepting requests for online connections, such as become 'friends' with someone, or 'linking'" says Andrew.
You don't want to scare them away from using the computer, but a little bit of guidance can go a long way.