It's not just a suggestion that THC fights cancer. Actually, it's quite the opposite from your post, mullmaniac. Scientists say there's no evidence smoking weed will give you lung cancer. This doesn't mean that smoking has no side-effects. You can develop bronchitis and your chances of a heart attack increase five-fold, but you most likely will not get cancer. If you wanna be extra careful, use a bong, as this filters out more than 99% of tar.

http://www.webmd.com/content/article/23/1728_57309

I felt the need to edit and say that I didn't mean that in any negative way, mullmaniac.