[delds]

First none or at least most of us here cannot comment from a legal standpoint.

But the personal opinion is, don't panic. I have my forums set to diplay ip's on all posts to everyone, in hopes it may cut down on the few idiots that occassional try to post spam. It seems to help but nothing cuts out everything.

It could be nothing more than a idol threat, and although scary, I would think it is most likely that and nothing will become of it. A lot of providers use dynamic ip addressing, and ip's are shared and not fixed to one user. He /she would have hire a lawyer, get the provider involved, and cost him or her a lot of money without ever knowing if they could when it. And against an individual that runs a not for profit site, and not even knowing what assets you may have. (no point in wining a case against someone who owns nothing). And all this just because they got kicked off some site. I think the person is pissed off and wants to share the pain. I personally would not even reply back.

I have traced ip's before and I can tell the location area but not the person. (you would likely need the co-operation of a provider to nail who had the ip at any given time) Your super mod's likely should not be giving out ip's to other sites, and the person with ip that was on your site may not be the person assigned the same ip on another site.