Gross and disgusting. Most states have laws against obscene license plates, etc. However, I have always felt that the punishment is really delivered by public opinion.
When you see somebody with a bumper sticker like that, you know exactly what a jerk and creep he is. And I’m sure most women - unless he finds them under the highway overpass - would avoid him like the plague.
Pickup trucks with a large atificial scrotum hanging from the trailer hitch tell me the owner is trash.