Ok, here's some more of my pet peeves:
1) You're driving along and you see a sign that says "BUMP". WTH? I can only guess it was cheaper to stick up a stupid sign than to actually fix it!
2) That's right up there with "ROAD SUBJECT TO FLOODING". See #1. Idiots. It's not like they don't know there's an ongoing problem. What's sad is the sign's usually been there for so long it's beginning to rust. *#*^@^!!!!
3) (Edit to add). Tools with handles. Rakes, shovels, hammers, things like that. Hate 'em. My dad once told me "Never buy a tool with a handle- it means you have to work". The old guy was right.