I am a member of both CASAA and ECF. Sorry, I really don't mean to offend you.

It just hit my funny bone wrong.
I personally don't believe that Naturally Extracted Tobacco have carcinogens in them. I don't know much about absolutes nor do I know about WTA's. I use NET liquids. I would be more wary of the WTA's only because more of the chemical compounds of the tobacco are extracted. With NET's, they are just getting the flavor from the tobacco.
My take on the whole thing, just my opinion only, the burning of the tobacco and paper causes the chemistry of the cigarette to change. The result from Burning and the Smoke from the combustion of all those additives in addition to tobacco, are what causes the carcinogens to come about.
Tar is a very nasty byproduct of burning a cigarette. I feel the I'm using a HEALTHIER alternative. 100% free from danger? I don't believe it is. Nothing can say that it is 100% good for you. But I don't believe I'm putting myself in danger. I am using something that is by far(!) less riskier than smoking traditional cigarettes.