People who talk on their cellphones in the bathroom. I always try to be as noisy as possible when this happens.
The people who can’t seem to do anything unless they make it a crisis.
Bosses who step into a bathroom stall mid-conversation and keep talking, expecting you to stand by and listen.
As do I. This really annoys me. You're so busy and all-important you have to take a call while dropping a deuce? Give me a break.
I'll burst a blood vessel trying to make some extra noise when I hear this sort of thing going on. Just once I want to hear one of these clowns 'fess up that they're in the can---that'll make the person on the other end of the line feel all cuddly.