Great, you're in the 10%, but if you know other smokers, you know they throw their butts on the ground at least some of the time, I've seen smokers do it when a receptacle was 5 feet away. I was being hyperbolic, but having witnessed thousands of smokers in my lifetime, especially from when I was young, I'm pretty sure I have a decent sample size. All of them threw their butts on the ground, giving them 10% that didn't was being generous to people like you, which are basically unicorns as far as I'm concerned.