That topic should be a non-starter as long as US government policy is to keep shitting in the food bowl. There's way too many communities living under the toxic spill or waste of some unregulated industrial process -- and the country seems perfectly ok with that kind of "lifestyle". I really don't see why we should villify individual lifestyle choices when the entire country is happy with intentionally harmful policy choices.
So, if health insurers want to start charging premiums I suggest they send their bills to Superfund sites first, then to regular toxic cities like Flint, Camden, Hinkley or Picher, then to producers of known-carcinogenic substances (like Chrome-6 or Roundup), and then to advertisers of known-harmful products like alcohol or tobacco. Only when they run out of those targets can we have a discussion on individual lifestyle choices.