In my experience, people will do whatever they were going to do no matter what you tell them*. Good people will do the good thing. Bad people will do that bad thing.
People don't really change. I was concerned when I first arrived here, but generally, once a dirtbag, always a dirtbag. Not that I'm not fond of them, but if I actually slept, I wouldn't be losing it over occasionally goading them on.
Does that answer your question?
*Although you'd be amazed how effective reverse psychology is on the weak willed.