Sometime a Mob will just get on everybody's nerves, they'll get too big for their own 'Obnailz and annoy so many of the other mobs with their greedy selfish Orkiness that the other mobs sometimes band together to 'Bash 'em down a peg or two'. This is especially tre for an old, successful well-established mob (with a high Mob-Rating) who get a bit too hard for any one mob to take on, on their own.