A Big Lie.

Here's a good Big One: Second hand smoke is more dangerous than taking drags off of an actual cigarette.

Go ahead, flame me. Tell me how unattended cigarettes burn at a lower temperature and therefore don't incinerate all of the toxins before releasing them into the air. I've heard the yadda yadda, same as you. That much is true. That little itsy bit of smoke *is* more potent than an itsy bit of "heated" smoke. The big lie is that there's just so little of it compared to the lungfulls one gets via direct injection when actually smoking.

Put it this way: you've heard the same thing about car exhaust. An idling car creates more pollutant exhaust than one going full speed. But you know what? No one says that breathing the air at an intersection is more dangerous than actually wrapping your lips around an exhaust pipe and sucking in a big drag. Why not? Because it would so obviously be a Big Lie.