Is there a way to label a locker?

This seems like a glaring and glaringly stupid oversight. I have a big sharpee in my inventory. I have a great many lockers, so many that organizing them is not trivial and takes some effort.

Is there any way to write upon (change the name of) a world object that I cannot move upon?

you can’t rename a terrain object, but you could use the spraycan to write on the group in front of the locker