I have a similar story, I had teammate in a siege the map was just 1 second from bieng over and we won, so he just killed me on purpose. (i dont mind that, its end of map, nothing saves and he just wanted to get 1 last kill in) Next map he is on my team, and he starts hitting me, a enemy comes near me and I know the enemy will try and kill me anyway, so while i was fighting enemy, he tk'ed me in the back, it was 1 time occurance, so I said that he better stop tk'ing me because I can kill you back if enemies arnt around. Then he tk'ed me again, so I made poll to kick him (kick not ban, nothing much) then he started pleading that I started it first and he was just defending himself, so then the people and some guy, gave me a warning and told me to stop, I tried telling them that he started it, but it was no use. He tk'ed me again, and he said to me stop starting it, and i got kicked. (I didnt even do anything to that guy!!) So, you really have to look, at whats happening, before kicking. Especially if the person forgot the name of the low ping siege server. Also, if you give a guy a warning to stop or they will take further actions, doesnt it make sense that they will stop, and not keep going?? I got on the server about a hour later, about 4 people, turns out he was trolling all night long, they made a vote ban and he was banned when the guy wasnt there. So I proved my point.