Naming and Shaming?

we have the blue stickers of death. They would do the trick

What a good idea. It doesn't even need to have any wording on it. Just, say, a yellow triangle or something. Something that can be punted around the cycling community but not neccessarily universally known or recognised..

erm, most people wash their cars and might see it? even by walking around it or someone else pointing it out, it's not gonna stay on for long.

we still got the WAC stickers, which have been used before.......or just lob a brick through their window??? :)