Let me finish that thought from the subject line here:

I swear that there isn't much worse than stepping onto an elevator and being smacked in the face with the stench of a smoker who was just there before you.

Ugh.  Ick.  Blech!  and a batch of other responses along the same lines.

I begrudge no one the right to smoke if they wish, but I really don't care for the effects that smokers have on the environment around them.  Especially smokers that bring the lingering smell of their dirty habit along behind them whether knowingly or not.