yeah i figured something like that was the reason they're rare now.
but one way or another we need a better mousetrap, either a debugged pneumatic or a re-calibrated and more discerning sound sensor.
i mean, the ability to smoke in non-smoking areas is one of the perks of a PV, and bars and clubs are at the top of the list of places where people love to smoke but can't. bars and clubs everywhere have been hit hard in the pocketbook we could prolly get owners' associations to finance the research!
this is a wish list, so that's my wish. how to do it, i have no idea. but programming technology probably holds the key. heck the gov can detect via a mic aimed at your window what keys you're hitting on your computer just based on the electromagnetic radiation generated by the different keys, so surely technology exists to discern a puff from other sounds.