It said 'Thank you for your inconsiderate and selfish parking'.
I'd parked in Mum and Baby section, the 'space' next to my car wasn't a parking space anymore (although in their defence it hasn't had the paint taken off, it's just they built a trolley park over it so it wasn't really big enough for a car)and they parked so close to my car that although I could get in on my side, I couldn't even walk down the other side, let alone get my sleeping 4 month old in. I had to park the pushchair in front of the car, move the car, then get baby and pushchair in.
I've never left a note on anyone's windscreen before but I was so annoyed! They had even parked at an angle as it was the only way they could get out.
Grrr..