Hobby is one that bugs me, too. I mean I get it, there's certainly more of a hobbyish element to it than, say, sucking down a pack of Marlboros. But at the same time, it also feels like a cover word for tobacco shame/Nic addiction. I suppose it depends on the smoker and how/why/with what they smoke, etc.
It just instantly reminds me of a thank you note Jimmy Fallon once wrote that said "Thank you Craft Beer, for making my alcoholism seem like a fun hobby."
Never been bothered by baccy, and obviously not piper, hahaha. When I hear the word smoker I immediately think of a cigarette smoker so I think it's a valid distinction. And a community is a community whether you're sipping wine or shooting heroin, so that one has never bothered me either. Just means folks with a shared interest or common goals, attitudes, etc.