As I leave my floor to get a form, I see the agency busy-body at the copy machine. She works on another floor but is, for some reason, using our machine.
When I come back 1.5 minutes later and try to make 10 copies of the form, I see that the machine is no longer working. I figure out what the problem is and find out she loaded the paper wrong. I reload the paper and make my copies.
I checked with three other people in the immediate area. Busy-body had not informed anyone that she could not get the copier to work, she just left the floor.
So my pet peeve is people who leave things in a broken state for the next person to fix. What's yours?