Here in California, "Local Motion", Calvin peeing on Ford, Body Glove, and other car stickers have been popular. Of course for the last few years we've had "Support Our Troops" ribbons (I'm told that christians place these ribbons sideways to resemble the fish symbol).
Now the latest juvenile car decorations are fake bullet holes. I predict that within a month you will not be able to walk across a parking lot without seeing at least one car with fake bullet holes.
The owner of this truck has expressed his opinion on the subject with real bullet holes.