#19: Sounds Like a Reasonable Trade
One of the most popular places to place a sign is on your car, through bumper stickers or window decals. Personally, I never use them, because what if I want to sell the car and a new prospective owner doesn’t want “My other car is a Ferrari” stuck to the bumper? But for many people, this is a popular piece of décor for their ride.

And it’s a good way to communicate your support for certain issues. This person is willing and ready to welcome refugees to their community, and in case someone in the area disagrees, the decal proposes a trade that seems to solve the problem. I think it’s safe to say this car sticker raises a lot of controversy on the road.