A couple of thoughts. I would guess that most people doing it aren't trying to intentionally annoy anyone and there could be a very valid reason. I doubt it's very common. I know I haven't really seen this as a widespread issue but it might just seem that way at the time. I have come to learn as I get older, most folks aren't nearly as considerate as I want them to be. Guilty as charged myself on occasion. It doesn't mean it's malicious. I would ask, why it bothers you so much, or more pointedly, why you let it bother you? While we can't control other people, we can control how we react to them. Life is short. Pick your battles.