It has to do with the vacuum. Cigarette smoke is not the real problem. You are not supposed to drink out of a straw either. Right now your mouth is trying to form a bloot clot in the spot your old tooth was. If this clot somehow gets damaged or dislodged, there will be no protection covering your jawbone and the nerves at the bottom of that hole.
I think I waited 5 days, but took the occasional puff by keeping my mouth open and inhaling. That's one of the major pros to having a manual e cig; you don't need to create a vacuum to inhale vapor. Make sure you inhale on the opposite side of your mouth. I read a lot online two weeks ago when I got mine pulled and it said that after 5 days your chances are very very low, but not gone, so if you can wait until then you will be good. I didn't do this though, although I probably should have just to be safe.
My friend who is a smoker, said to put wet guaze over the extraction site when you smoke or vape, but I never tried it and decided to do what I mentioned above.
Don't do it too much because from what I've heard dry socket is one of THE worst pains you can get. The risk is just not worth it.