> Using the wall as support causes the defective door latch to release the door, which > then swings open in your face at a time when you have no hands free to do anything > about it.
That's why you'll do it quick and alone. Good thing bathrooms have "stalls where the walls are easily 20-30cm up from the ground" to check. Besides, how could we pass top secret documents and messages under? Flying suitcases and cellphones are too suspicious.