Idiots who knock on closed doors and service windows when the store is CLOSED.
There is a special place in hell for people who arrive to a closed business and then knock on the glass door or service window, as if the rules don't apply to you.
The person inside counting the cash or cleaning the floor is not proof that the closed sign is wrong. You are proof that some of us never evolved past the monkey /caveman stage.
End of rant.