First off, I watched the story unfold myself, that was no proxy ban:
DesNordens guys start kicking themselves around in circles again, Opiumdk walks trough them, gets kicked around too, he throws a javelin at the ground as warning (He is one of our better throwers, so I think he would have managed to hit at that range if he wanted to), seconds later he gets hit by friendly javelins and axes. Means, 2 of you guys did teamattack, only catched one sadly. Not enough, you polled Opiumdk afterwards and he got kicked from the server.
Unban 9.3. for intentional teamattacking + poll abuse.