Jack himself may just be annoying with his 110+ accounts. However, I noticed that Lio's block is set to expire in about two months. Hopefully, he's changed. But it has crossed my mind that he may not have, and that, furthermore, he might see all these Jack threads and realize that we have no practical way to IP block and hence take advantage of it.
He certainly realized that, before we finally nailed him, there was no acting admin to ban him and was a thorn in our side for a couple of months until Peenut and I were made admins and could deal with him. I wouldn't put it past him to find the Jack stuff and realize that IP bans aren't working at the moment.
While Jack doesn't appear to do more than rant about his fanfiction, a troll/spamlord could really wreck havoc on the forums and we'd have to play whack-a-mole to get all the accounts to stop the vandalism.
Now, some like Claire will go away after we ban a few accounts that they make, but, on the other hand, others like Lio may get a kick out of us chasing all their accounts and trying to stop them.
If, however, it's seen that we can, if need be, do an IP block if need be, would-be-trolls may back off and not try it.
I did think that, as I posted on the most recent Jack thread, that a direct IP ban (that uses his actual IP address) and using the correct paramaters might close the loopholes that Jack is using. And if we can get Jack, we can be ready to do the same if Liopleudorons or some other troll attacks the Wiki with multiple accounts.