one of them was this dude
http://www.rollitup.org/members/ganja-gooroo.html He didn't rep for Nirvana but he was acting very shady. Check out his four posts if you like. I ignored the fucker the second he started acting squirrely.
As for firewalls. They keep invaders out. They don't hide who you are unless you've got hundred's/thousand's of users inside that firewall.