I’ve gone in the RR after a theater movie or other places and seen countless purses ON THE FLOOR in the stalls. They usually put little hooks on the doors just for that. I have no idea why any woman would put their purse on the floor in a public toilet, but they do. If there’s no hook, I hang mine over the corner of the door.
Good point - the second scariest thing are shoelaces... I worry that they touched the floor in a bathroom.