Unfortunately not all folks are as "considerate" as some smokers

I agree there, Em. There are SOME smokers who are considerate. Unfortunately they are more than cancelled out by the millions over the last few hundred years who have killed off countless thousands of innocent people. Smugness may be annoying, but I don't think it has ever killed anyone. If I may turn your phrase around -

Unfortunately not all smokers are as considerate as some folks which I think is demonstrated by the smug, self-righteous tone of some of the people who have killed others and don't seem to care.

I know how considerate you are though so I hope you don't take offence.

Cheers

Dave