Statistically, law enforcement officers are at their highest danger in responding to domestic violence calls; there is a strong likelihood that one or both people will turn on the cops and start assaulting them. If someone is waving a gun around, the initial victim *and* the cops might get shot. And then there's the problem when someone gets arrested and the other partner suddenly either lets out a lot of pent-up emotion, or the beater threatens the woman, or she starts hitting the cops.

So yeah, there's actually more 'order,' so to speak, in breaking up a bar fight. There's just no way to know how dangerous a domestic situation is and plenty of police have been killed responding to these complaints. (Of course, that doesn't mean they shouldn't respond because that's what they are there for, but I can see why they would dread going on these calls. Add in scared children and neighbors who want to weigh in and it could easily be a nightmare. And, you know, sometimes they get called to the same places again and again. Helping to break that cycle is something we should all be concerned with.)