...to make this necessary. This is a picture of one of the automatic sprinkler heads on the ceiling in my hotel room!!! (click it; it grows.)
In other words, DON'T HANG STUFF HERE, YOU IDIOTS; THERE'S A CLOSET LESS THAN 10 FEET FROM YOU!
Sheesh. I mean, really. Think of all the money they must have had to spend to make signs for the entire hotel chain because some goober in Oklahoma or somewhere tried to hang their clothes from the sprinkler head (which is 9 feet of the floor, by the way!!) and soaked a whole hotel down.
Here's your sign. Literally.