My usual sarcastic but unheard response, particularly to cars passing nearby with booming subwoofers, is Thanks for sharing.

I think see the point about food, but we're probably guilty of that one, too. When we have game nights, we'll usually have food about such as hors d' ouvres and such. We don't encourage anyone to eat anything they don't want to, though. And I've actually gotten out of the habit of having food when going to the movies. Ridiculous pricing helps there.