After playing New vegas. i found i had to pass a speech check to make the NCR be the good guys. so thats not it.What i mean is. marauders are running around everywhere with SMGs. and NCR has an army. its not the junktown boy scouts. its an army.I'm just suggesting that if you have under -300 rep with NCR, than if you get shot while infront of those patrols they protect you. and add the patrols to the tiles directly around NCR, so lowbies can farm. and are protected in away that makes sense. no magic "PvP on/off switchs" or anything like that. Also. it won't mess with your grid camping, should anyone care about that. you can still camp. just wait for rad scorp's only. without the patrols.-Ulrek-