I concur. It seems obvious to me that at the very least, pouring copious amounts of hot smoke into your mouth/lungs on a regular basis is not good for your long term health. It's humorous to me that so many of the 'pro-science' crowd become strong skeptics when it seems the facts might reflect poorly on thing they care about.

It gets pretty confusing when cannabis itself is thought to have anti-cancer properties and the actual amount and temperature of the smoke is much less than that of tobacco. Yeah breathing in any smoke is not good for you, but is it like smoking a pack of cigarettes? Or is it like enjoying a campfire and breathing in a small bit of smoke? One is profoundly bad for you, the other is of such little concern that nobody should be worrying about it unless they have serious lung conditions.

Breathing in campfire smoke once in a while is not a concern. If you are breathing it in day after day...