I'm not necessarily implying that he's doing anything shady, otherwise I would have just banned all of the extra accounts, but it's strange that he would have friends registering here that have the same IP address as him and none of which have mentioned that they are his friends and neither has he.

Most of this applies only to Optimistic and Ambam, though. I just want him to explain what's going on, really. If it really is friends, that's fine.