Your lungs can recuperate after you've quit smoking, though the damage it does assuming you don't quit is the worst. I know alcohol can destroy your liver, but it can be drunk in moderation. I'm not sure what the drawbacks of weed are, aside from an altered mental state. I think it kills brain cells, I'm not sure. I'd say a regular cigarette does more damage though.
Thanks for the warm welcome, all . And it is working for me now, I've gotten some neat-o gardening supplies. Fingers crossed that someone buys this junk.