Seriously people, use the fucking fan. It clears away odors and covers up the sounds of your dropping a deuce. If you want to stew in your shit smell and revel in the music of your magical poop plops, do so in the comfort of your own home. If you’re a guest and the bathroom has a fan, turn it on. We don’t want to share.
I mean, you can stick a light switch with a motion sensor on it that’ll flip on automatically.
https://www.amazon.com/motion-sensor-light-switches/s?k=motion+sensor+light+switches
Probably easier to make your machine do what you want than it is to make global human behavior be what you want.
Probably easier to just not invite shit-sharing assholes.
Its global human behavior to share your shit smells with the group?