Add in a mop that uses oldmopping

[The Grim Sleeper]

I don't like this idea.

It's not like you can't slip people up in other ways, both stealthy and unstealthy, and if you want to be a dickish-but-not-antag janitor, you can always just put the signs down and never actually mop up the water. People will be plenty pissed about having to walk everywhere.

Messing with the fluid-physics of an item for nostalgia seems like a bad plan.