The Method of Reducing or Avoiding Secondhand Smoke in 2009 (revised in August) may help you solve this problem. In fact, in simple terms, the main idea of this method is tit for tat.

Don't you want to smoke indoors? Then I'll fight with you. Specifically, it's cold. If you want to smoke, I'll open the window. Anyway, I prefer northwest wind to second-hand smoke. What can you do with me? Are you still awesome? Then I might as well turn on the fan, because I am not afraid of catching a cold.

Then, I will read aloud the implementation guide of Article 8 of the Framework Convention on Tobacco Control when they smoke. Don't you want to hear it? Then put out your cigarette first and I'll read it again. What do you do?

In the past, the administrator greeted him and said that today the leader came to check, please don't smoke; Or the library has regulations that smoking should be fined or something.