Aside from the obvious measure of can bad boy player x help us more than he hurts us, I think it is clear that pro groups will embrace someone who has acted badly into their team if that person can demonstrate they are no longer doing the bad behaviour. A player with a bad history of something, who has looked inward, got help to be better, and no longer behaves this way will be welcomed. Almost every player in any locker room has acted badly in some way. The question is, who are you today.
Therefore, a person who has hurt his spouse, committed a crime of some kind, but who has grown and is always working to better and trying to act as a good teammate, can be welcomed.
In this case, IF Hoffman is standing by his girlfriend even after her alleged behaviour is proven to be true, then he could not be welcomed into Ottawa room, no doubt. In that case, someone who is currently supporting this awful behaviour (his significant other tormenting your captain/star players wife and making such horrible comments about his child and career) could not be welcome into any teams room, without concern.
I would much rather have a reformed spousal abuser in my team, someone who has paid the price and would now stand up for right and protect a woman, than allow a player onto my team that would support his spouse attacking my teammates spouse in the way alleged here.