The whole IP theory isn't very concrete. If a person uses dial-up, they are assigned a new IP every time. And if someone was desperate enough, they could use an Internet Cafe or otherwise. Basically, if someone really wanted to keep their IP anonymous, there are several diff methods. Not to mention web services that will annonymize their IP for them. It's just a matter if they are that determined to keep themselves secret.
TheRx's #1 lurker
TheRx's #1 lurker