I think the response to the horn depends a lot on where you are. Ex in a city it is more to just make you aware. In a neighborhood it is more likely to feel like a personal attack.
We've got a reverse lane in Phoenix. In the afternoons between 4-6 its only used for traffic going north.. those who dare enter the lane headed south get my horn wrath, and it happens every day.
I give little beeps to bicyclists well ahead of time so they aren’t surprised. And the occasional anger blast to an idiot driver. But I need to be more careful now with so many people driving with guns. Do you drive with a gun?