I’m speaking in terms of hospitals taking action to deny hospital privileges. In that case complaints of condescending language or voice intonation is overly vague, easily allowing abuse.

“In principle it makes sense to attempt to reduce disruptive behavior, but definitions including “condescending language or voice intonation” are overly vague and risks taking this too far.”

I agree with the first half and have a question concerning the second half: taking what too far? Are we talking about a blame-game? If so, then yeah; already too far. 
But if (as I hope) we’re talking about improving a bad situation by asking everyone to improve themselves, and possibly by stressing non-violent personal communication skills in medical, nursing, and business schools, then we haven’t taken it far enough. Indeed, it would be hard to over-do.
And how do we get our schools to stress these vital skills? By complaining about our current lack of them? Yes; energetically but without blame – state the facts, our own experiences, and suggest a solution. Get hold of anyone and everyone who is in a position to do something about the training our doctors, nurses, and business people (and others) receive; let them know that they can improve their training in this way.
Changing a heartless society isn’t easy, but people genuinly do care, so it’s not impossible. Unfortunately, we all glorify what I call the NY syndrome. To quote a popular character on a popular sit-com:
“We’re New Yorkers! We don’t push our feelings down; we shove ‘em into somebody else’s face!”
That popular sit-come went on to present this moral (paraphrasing again):
“Kids, you don’t have to choose between keeping your emotions bottled up or shoving them in somebody else’s face; you can simply acknowledge them, then let them go.”
It’s a lesson we “kids” need to learn. We all can, but we have a duty to help our next generation be better than we are. This is one sure way to accomplish that.