If you don't feel disgusted by the idea of your poop particles being ejected and spreading around, I don't think anyone can instill it in you

How much does the door help? I think generally people don't follow hygiene to the point that particles anywhere in the bathroom won't get tracked out of the bathroom. Don't get me started on people who touch their phones while eating...

I'm writing this while sitting on the toilet, and I'm thinking about making a sandwich.

A bit, and it's not like it's too much of a hassle

People often keep their toothbrushes in their bathroom..

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

Sure, you can't get rid of everything. But you can mitigate a few things, and closing the door is such an easy fix... There's worrying too much, and there's not worrying enough

So that poop particles didn't spread beyond the bathroom.