When I was in Saxony, Germany, last week, a car passed me carrying the bumper sticker, "Death penalty for sexual abuse of children".
I could not help but think that this was a rather specific bit of legislation to put on one's car, and I was surprised someone felt this one-liner was a constructive way to start a debate about an extremely complex topic.
Maybe it is a cultural difference, but in Denmark, political bumper stickers are extremely rare except on actual campaign vehicles.