Reminds me of my brother (very distantly related to me - you'll see why) when he lived in Redditch (for which I'll sympathise big time to anyone who has to live there!).
They had only a few parking spaces and someone parked across two of them. Typical of my brother he just had to leave a note on the windscreen: "Just think, if you owned a Rolls Royce you could take up 3 whole spaces instead of just the two".
Luckily for my brother the guy had a sense of humour, seeing as he came knocking on the door - seems brother had written on the back of a used envelope! Doh!