That's one extra thing that makes me want to get on board air and an air horn.
Not a fan of those annoying things under just about any circumstances except perhaps imminent collision, and even them you're more likely to just scare the crap out of someone you're going to plow anyway.
Unfortunately, some people like to use them like they roll coal, and that's just stupid. It's all fun and games until someone gets sued for hearing damage.
Queue offended air horn owners in 3, 2, 1...