#42: Knock knock
Yep. This one is so crucial, this Reddit user decided to write it in all caps. When something is written in all caps, there’s a better chance we’d pay attention to it. And this person needed to get our attention. Although it seems like common sense, not everyone knocks on the door before opening the stalls in public restrooms.
If you’re unsure whether or not the stall is occupied, it’s always better to knock. Of course, we all lock the door when using public restrooms, but still, it’s pretty awkward when someone tries to open the door abruptly when you’re in there. We all need privacy in the bathroom, and that’s the opposite of that.