Dave is going to kick the cigarette habit. I think blogging is going to help him do it in a couple of ways. One is as a postive addiction to occupy his mind. Another will come from the conversation and information and support he gets via blogging.
Just a guess, but Dave probably won't cope by gunning down wildlife in his backyard. Closer to home, another friend of mine also needs to give up cigarettes. I know he can quit--I've seen him do it a dozen times before. Anyway, this summer he is soaking up some of his withdrawal-induced hostility by doing a little varmint hunting on his property. Good news for his lungs is bad news for racoons and rabbits.
One of the best lines I've heard about addiction: "When you do a line of coke, you feel like a new man. The only problem is the new man wants one, too." Jackson Browne said it many years ago at a concert in Greensboro as an intro to his song "Cocaine." I don't know if the line was original to him.