I nearly left a note on someone's car the other night. I actually wrote one out, carefully wrapped it up in clingfilm so that it wouldn't get wet and walked out of the house to pop it under the front windscreen wiper. At the last minute I managed to stop myself though.
Perhaps I should explain: parking is at something of a premium around us, and this clown had parked his car right in the middle of a two car space. It wasn't his first offence either - he drives a bloody great VW Scirocco, so he's pretty easy to spot, and is showing definite signs of making a habit of this.
Annoying, but is it enough to tip me into becoming the kind of person who leaves notes?