OK: yes, this is actually a "smoking is bad" ad in disguise, and yes, we all know that smoking is bad and that it will kill you, but this is funny anyway.
Am I the only one who assumes that everyone who starts smoking knows it's bad for you? It's like assuming that everyone who isn't Christian hates Christians because the bible says so. People who aren't Christians and hate Christians don't make up the majority of non-Christians, at least in my experience. The non-Christians haven't beat me up yet. The non-smokers haven't ever told me smoking wasn't bad. They tell me at the tobacco shop that my pipe will kill me. There's no bones about it, as it were.
I'm just sayin' is all.