Equally pointless, except when it's been a very dry summer. In which case, I suppose I understand getting on someone's case about a discarded cigarette. Say what you will about dope smokers, but you won't find them flicking a burning butt into some scrub brush as long as there's a microscopic amount of chronic left!
Roaches are valuable and you know it!
I have never smoked, but knowing my tendencies...I am sure I would get every last bit out of a blunt. My refusal to cast it aside would have nothing to do with good fire safety.