Key-coded restrooms: Your thoughts? We disected self-check pretty

[Marthe48]

11. Lowe's has coded lockers

The lockers are at the front of the store. You order and pay online, the shopper puts your stuff in the locker. Lowe's sends you a text when the order is ready. When you get to the store, you send a text. Lowe's sends you a locker number and key code for the locker your stuff is in.

Places with key coded bathrooms could do something like that, maybe. It would be a pain to give the store notice you are there, but you wouldn't have to bother the employees. The codes could be changed daily or so.

Are the key codes for personal security? Or to enforce "No Public Restroom"? Or some other reason?
I can usually avoid using a public restroom when I'm out, and I haven't seen any key coded doors in my area.