I voted no on all encounters that may lead to player vs player situation, including warzones, but as many have said the warzone issue is a kind of gray area that may be acceptable as long as all parties involved consent, voice chat has been provided for us, we should use it.
I have a concern however, I've seen quite a few posts on the general forums inviting other players to come join us in our group with the promise that they will never be attacked by another player, it's my opinion that these guidelines/rules should be decided upon as soon as possible to avoid any misunderstandings and to make our groups position clear.