Pernabanned user making new gimmick every day; Whats my line?

[Hercules]

HI,

after several bans i had to permaban a guy yesterday. Here´s the thing, like we all know its possible to create a new account. Thats what he did and he started trolling again and posting the reason for the temp ban (which i don´t really care cuz i gave him valid reasons...).

Well, i believe he is one of the guys who will create new accounts every day and it will end up beeing a ban-create-game.

Whats my line here?

- IP-Ban . Problem with that is that if he has a router or anything, he´ll get a new IP every time he connects with the internet...