Hopefully your car has never been so coated in dirt and grime that another pedestrian was so disgusted they felt the need to write a message on it. If it has, shame on you. Take better care of your car. It's not a freakin' useless gift that your grandma gave you for Christmas one year that you can just disregard. Anyway, if you do allow your car to be covered in filth, don't be surprised if a message or picture shows up on the window or trunk lid, with the explicit details about how dirty your mom or sister is. And if that's all there is, be thankful. As evidenced by these photos, it could get a lot worse and a lot weirder.