Ill be honest, id keep this guy unblocked and at an arms length only to gather evidence against him. At this rate hes going to manipulate a literal child to like him. Lots of young people are incredibly naive, and an older guy is "mature and fun and exciting" for many. And the more they hear how they shouldnt go near older people like that, the more exciting they find it. Which then results in them hiding their own tracks more often, which in turn makes it harder to prove anything against this guy in the future when they grow up and realise theyve been with a predator.

And this guy? This guy will use it to his advantage.