tbh if I start worrying about poop particles in my day to day, I fear I'm one step closer to becoming a germaphobe. plus I feel if that's something that truly worries you, you'd start taking showers after each poop because clearly you will bring some poop particles with you when you leave anyway.

maybe this thread will end up being some kind of revelation, but I very much agree with the person you replied to. If I'm alone, I'm not bothered and the door may as well stay open