friend or foe - distinguish - put npcs, buildings and players in teams

Maybe make the good and bad guys have different collision objects/class. So good guys be pawns and bad guys be vehicles or something like that. Then have enemy character run a trace for pawns and vice versa. I was wondering myself if you can make more collision objects. There should be an AI class or custom ones. Im running my AI with this method, it seems to work fine. I have made my AI fight each other this way for fun.lol