I have had someone come in after I peed around a bathroom and I just said nothing and left. I think if someone caught me doing it I'd probably say that it is fun and maybe try and encourage them to do the same, though I don't expect that to even work. Maybe I would get blamed for being drunk.

Same for my back wall. Really, I'd probably like to find a wall along an alley, or a fence in a park, and leave a big mark. Piss marks on walls etc., get me going, so part of the appeal is the idea that perhaps someone might find what I've done, and even enjoy 😉 or reciprocate, enjoy a good piss of their own over the top of or next to it. It's not always possible to find somewhere suitable though, cameras and security everywhere, too many people around, so often my back wall just gets a good hosing when I get home. And it's usually a really good piss, cause I've probably been holding it in and it's all completely private so I can spray all over the place. It's just a lost opportunity for someone to find the result.

That's kinda the point. Making sure there is noone around that could potentially connect me to the deed. And if someone was to enter after I would go for the: Be careful where you step, I think some pipe is leaking cause the floor is wet. That obviously only works if you've only peed on the floor close to a pipe, if having had even more fun with it it's more a question of "run like hell" or saying someone messed it up and then going in another toilet to look like you didn't get to do what you came in there for and have to go to the next one. And yes, I have thought it through maaany times *lol*

What would someone even do if you do it around them? I feel like if anything most people would just comment about how disgusting it is or say nothing and give weird looks.

Just make sure you're alone and noone you know entering after you. I routinely do it if I'm sure of getting away with it. It's such a great feeling.