I have one more comment.
To say that cigarettes do not affect others is pretty commonly accepted to be untrue. Second hand smoke is bad for anyone, and if people are forced to deal with it, then smoking becomes not just the concern of the users. Now, let me give an analogy. Drew does not encourage the use of homophobic slang on campus, yet many ignorant people still choose to use such words at their discretion. The similarity between this and smoking is that although Drew cannot force people to stop smoking, much like they cannot force people to realize how incredibly insensitive they are. They can at least do their best to not endorse it.