I'll take more shit for saying this, but I think the negative health effects of smoking are quite minimal, for most people, for the first 20 years or so, and are probably less than the health effects of obesity. But you still need to recognize that you can't do this for life, and quitting, whenever the time is right, will be very difficult. You also need to recognize the social externalities, like smelling bad, people not wanting to associate with you, and places you can't go or live.
(Just reiterating that this is unlikely to be a smart strategy -- but you requested "weird", not smart)