From the game guide:
We don't tolerate clans or group of players ganging up on others. It's considered **** behavior. Please join games designated to clans or teams. If you are in a clan or play with friends, it's acceptable to play in non-clan games as long as you don't specifically form relations with only your friends or clan members. We consider a player is ganging up on others when a player plays several times with same allies and attacking on other players. If it just happens in one game this is not consider ganging up. Sometimes diplomacy with other just lead to this situations.
But if you find a mod or any player ganging up in more games with same players please report him
swetha1 wrote:
A teaming Moderator is a very very bad combination of words describing any player in this game
Agree, but I hope this has not happened. If you notice suspicious behaviors please report to us as soon as possible so we can investigate and take appropriate actions.