Yeah the human element obviously is harder than a static foe, which is why we teach a mixture of guides (soft rules) and hard rules. Something like:

Hard rule: never send photos of yourself to someone online, without letting one of us do it for you.

Guide: Don't trust any adults or other kids who ask you about your underwear

Rule: Don't tell anyone where you live or give them your address or where you go to school

Guide: If you feel uncomfortable talking to someone, stop talking to them and get one of your parents.