Not asking for confirmation of such but since sock-puppet accounts are allowed, I don't know if you guys track by IP. Any way to tell if he was at least coming from the IP of 5pppppp? Might be interesting to know if nothing else so the community can be immediately warned if he comes back as someone else.
That's one reason bans are a double edged sword. He will be back. Luckily, he's not very clever.