I remember a long time ago
I read an article of a woman who had cleaned her toilet with gasoline. Then later she decided to use it, and---you guessed it, decided to have a smoke.
KaBoom!
I don't remember if she died or not. I always was challenged on what was more creepy, cleaning with gasoline, or being so addicted to smoking that you needed to do it while on the toilet.
Yech.
On another note, I remember as a little kid various warnings to never ever use gas to clean anything. Sure it will act like a solvent and break things down, but there are much safer ways to do it.
It's not the fuel itself, it's the fumes that are so dangerous, that can travel along floors as the article states, and find an ignition source.