@CherNohio: The term for it is "shitiquette".
The only thing more egregious than knocking on a locked shitter door is zip-lobbing in a urinal directly next to an occupied one.
Especially when there's a row of three and the other guy is on the far end.
Either leave a gap or fucking wait, or lock yourself in a trap and drop your pants down to your ankles to piss like a pre-pubescent kid and wait for some anus-hat to come knocking.
BUT NEVER, EVER use a urinal directly adjacent to one being used.
@th3j35t3r here to say: this is illuminating to women. We just fight over mirror access, if that.
Stage Fright is an issue that must be dealt with.
@YouInMyEye @th3j35t3r
And with that, a musical interlude...
https://youtu.be/Vkv7nNL7M3k