It could cost a lot. Stupid players doing saying stupid things can divide locker rooms. See Riley Cooper last year. Even if he is let go as soon as it happens, I would imagine there would be some players who would question the decision to have such a known risk around in the first place. When you're trying to a build a team, and supposedly focusing on character, you need to limit risks. The Bills have already taken on a few high risk / high reward type players, I imagine they feel that they have enough risk to manage.