Actually, if an outcast from LA attacked LA (this happened multiple times when I was there), the defenders would have to pop up the player list and manually change them to dislike. This might have been fixed already, but I dunno.
if you log in after or before them they were on like. one way was dislike and the other was like...can't remember which way. all i know is every outcast i've had was dislike to everyone on the server.