You have made some good points but since I started really smoking and now just doing it with friends, I make sure I smoke every night before I go to bed. I can feel that my tolerance is going up, but I don't feel it's worth it to take a day or two off at this time. And if you're always careful, you don't have to worry about getting caught, although I try to be pretty careful and somehow still end up coming close to getting sniped a lot.