From Found Magazine's Find of the Day: Have a nice summer, not-cool loud-music-playing man!
This reminds me of the note that inspired Found's, uh, founder to start everything. He had a note left on his car from some girl named Amber who mistook his car for her boyfriends and left him a tirade about how he'd lied to her and he obviously was with HER, whoever her was. And then she signed it "P.S.: Page me later."
Apparently even when some people are mad, they can't eliminate all the note-writing niceties from their lives.
I sent a note to Found years ago, and it's scanned on their Web site here. I found it just outside the employee entrance revolving door at the Minneapolis Star Tribune newspaper, where I worked at the time.