[More Cowbell]

Smoking harms the person that smokes along with those around them due to second hand smoke.

This is why I used the phrase "smoking by oneself", which I meant to imply the act of smoking when no one else is around to breathe in secondhand smoke. You're right that smoking around other people does cause them harm, which is why I support the recent laws banning smoking in public places like restaurants.

Hmm, I smell a new thread...