This little idea is over, The Rights of English Men which currently enables player vs play combat. I came by a little annoyance with it not too long ago. Me and a buddy of mine, we were fairly low humors and decided to attempt at killing a deer. Well we ended up stomping each other stunning ourselves and almost letting the deer KO by our own stuns. I have a couple of ideas to fix this issue about friendly fire.
Fix 1: Have a toggle switch to turn off pvp or turn it on, once tagged for pvp combat it also is forced on. I personally don't like this fix.
Fix 2: Have everyone in your party immune to all forms of attacks from within the party. This in my opinion is the best fix, you keep all your allies in a party together while raiding and you make sure no one is hit by a sword lunge or AoE stomp.