When you're a smoker, the same thing happens, but in real life.

Well, yes. In real life. But not exactly the same thing. Actually a little bit more. Many people tend to forget the harmful, bad effects of smoking, which is dangerous both for the health of the smoker and the people around him/her, and also dangerous for the environment. There is no such thing in the case of Facebook. With the exception of possible addiction, of course.