I've fancied doing this for a little while now, and had thought about it a little recently. Then last weekend my son was at a chess tournament, so I designed these while I was waiting in the "Parent Pen". It was in a primary school, with little chairs. So you can understand how I suffer for my art.
The reverse says "Call the POLICY POLICE" along with the url for this site. I got them produced by moo.com - and I had them within the week. Maybe I should start leaving them in phone boxes... do people still use those?