What are you talking about? I'm saying the hacker would BE AWARE, not unaware, that the version was unregistered because a big fucking red sign in the admin CP said it was unregistered. Why would the hacker tip off invision? Simple, he supported a GM who was acting on his own accord on the server and had disagreements with Nathan, and the GM was part of a community most of the players came from. Nathan had a server before, and they were a part of that server as well, and so they had a past of distrusting Nathan (wise thing too), so the hacker didn't really like Nathan too much, but he wasn't a Black Hat. Being a hacker doesn't mean you're a criminal or in any way a nuisance.
Notice I said, the hacker "WOULD have seen that message." In other words, he would know it was unregistered, could inform invision, and if they knew it was stolen, would make him take down the board, which I'm sure the hacker had no problems with, since he didn't like Nathan much anyway.