5. Toilet Seat Covers. Unless you have an open wound on the back of your leg, you're not going to catch a disease by sitting on a toilet seat. You're more likely to catch a disease from that nasty sponge you use to wash your dishes. And, to whomever was taking a crap before me just now, at least have the decency to dispose of the damn thing before you leave the stall.
6. Empty Coffee Pots. There's a great scene in season 4 of The Wire when the mayor Carcetti gets caught by Greggs putting back an empty coffee pot at the police station. When I was at Lockheed, I learned that the higher your pay, the less likely you are to bother making a new pot. Why is this?