There be lurker miles, for example. It may not look like it, but there are quite a few registered lurkers that visit us. Usually they don't log in. If they do, they are "invisible". (Moderators such as MP83 can see them. Are you willing to give us a hand, MP? )
Dunno. To be honest, I was thinking of doing this for a long time. They are kind of hard to be identified (because they are often confused for missing members, which is something else). but it's possible, at times.
EDIT: Oh, also, I wonder if either mods and/or admins can see guests' IPs. That would help A LOT.
Last Edit: Jul 22, 2009 15:02:56 GMT -5 by Red Hairdo