Generally I’ve found the people who say this get privacy and secrecy confused. You close the door when you go to the bathroom because you want privacy, not because you have anything to hide. Everyone has a pretty good idea what you’re doing in there but you close the door anyways. Secrecy would be if you were cooking Meth in the bathroom and wanted to keep it a secret.
This is a cool idea. I really liked how you addressed everyone’s concerns even if some of them were already answered or just a bit silly, very cool of you.