If fallen was terrible then it would be fine to ban him but don't ban players who are fun to play against. Look at it this way, he does all the balancing for you. Every game he plays its always something unintended, 2 heroing, glitching, mind rape exploiting. All those things need to be balanced. Balancing is the most important thing with any game, everyone wants new spells, new heroes, new modes but none of that matters if all these exploits exist. We can ban people who exploit or we can address the real problem which is the game mechanics. Mind rape and 2 hero are both pretty simple fixes anyway.
