Chewing gum "snappers."
People hauling crap on highways without cover.
Promises made and not fulfilled - if you can't/won't do it, don't promise.
People who call cell phone and leave a message to call them without details.
Leaving a car blocking a gas pump while going into station for whatever when pumps are super busy.
Canceling or postponing a meeting AFTER it was supposed to begin.
Using my car and leaving it on empty - bring it back with what was in it.
Too much perfume or man juice in an enclosed area.
Taking up two parking spaces by parking in middle.
Leaving restroom "goodies" for others. Clean up your drips, hairs or whatever for the next user.