Well, of course it's disruptive. That's the point. You are trying to force a change in someone's behavior. But it doesn't have to be adversarial. You can have disagreements but still try to work together. In fact, I would say it is extremely important to try to do that in almost every circumstance. Even if you are confronting someone who is not an ally, it's best to try to do it in a way which is strong and firm but also doesn't make them into more of an enemy any more than necessary.