If I put myself into a mind like that, I think of the following:

Is it possible for the guy to disguise his mod again -- for example rename it, etc. -- so it doesn't look malicious once more? I'd assume it's also possible he could take another identity, stuff like that, so that he wouldn't be recognized here (or at other places). I'm thinking of things like username, IP adress (though that might be tricky to investigate), etc.