"Cold Turkey belongs between two slices of bread, with lettuce and mayo. Just because YOU decided to go
through that hell doesn't mean I'm that stupid." That's my stock reply.
The "when are you going to quit that thing" guy... just start .....ing back at him about his addiction to caffeine or cheeseburgers or whatever. Don't let those .......s take and keep the 'moral high ground'. Everyone, EVERYONE, has some kind of vice, unless they're saints or nuns or something. Don't let them slap you without slapping them right back, and do NOT let these jack-wagons discourage you!!