The question now is who hacked his account because that is some pretty shady stuff over some petty shit.
Can you use some Global Mod powers to see if there are IP matches?
I don’t think it would be appropriate for a
moderator admin to disclose confidential information to settle a dispute involving no money and only the disclosure of something that makes another forum user look bad.
Whoever hacked his account committed a criminal act by doing so. Admins don't have to disclose whatever info they find, but it should at least be looked into as they could have been stupid and left breadcrumbs leading them to other users. At the very least he needs his account back so they're going to have to look into fairly deeply to get it back to him.
I don’t think it would be appropriate for a moderator admin to disclose confidential information to settle a dispute involving no money and only the disclosure of something that makes another forum user look bad.
It would be very much in forum's best interest to investigate an account hack and ban the perp if possible.
It would be unusual and counterproductive to ban someone hacking accounts. This would only force the person to connect to the forum via alternate means, and it would be difficult to know if it is the same person if he hacks more accounts. It would also make it more difficult to track possible vulnerabilities that need to be closed. It would be better to give the person rope to bang himself with and go to law enforcement with evidence of his crimes if he is causing a problem.
I disagree, besides it would be more of a reputation issue to me and it would be nice to know who to not trust. What if there's clear evidence linking them to an existing user here and they're allowed to go on free with an unblemished rep.