Having worked on a childrens social internet site...
One of the active requirements during my moderation was looking out for potential sexual predators. We had continued series of trainings from child protection agencies on what to look out for etc.
It's a bit of a shock having to have this daily mentality of looking out for deviants amongst all the children. It got a bit much for me after a couple of months I can tell you, it's better to not think about these things than focus on them every day. Not a pleasant experience.
Anon for obvs reasons.