What I find interesting about cigarettes is that it created a whole new set of legislation requiring things to be non-flammable or at least flame-retarding.

The tobacco industry lobbied for this, because they didn't want to be held accountable for the deaths related to say a smoldering cigarette that lit a house on fire.

And those products themselves really weren't that healthy, as the flame-retardant added to say your couch would off-gas for a LONG time.

Now cigarettes (at least in the EU and in the USA) have 3 speed bumps in them, so they don't completely burn. They stop at each of these, and you need to suck more to overcome these bumps.