Someone tried to close my fuel cap once. Unfortunately I was driving a Fiat Coupé at the time, and one of its little loveable quirks was a fuel cap that you couldn't close in freezing weather.
Was driving round Cumbria once, and came up behind a BT van with its rear doors wide open. Was a big problem trying to find a stretch long enough to pull out, pull alongside, tell him his door is open, and then complete the overtake. He thought I was some hoodlum trying to get past at any opportunity. I was trying to get past before something came out of the back and hit me.