Using scale people ?

[eightyeightfan1]

Decals for the back window: "My kid beat up your honor student", & "I'm bored, flash me". If I could make them in white and small enough to fit the back window of HO vehicles and still readable, I'd do it.

HO scale Garfield stuck to a back window?
One of those stickers that look like a baseball hit the window.
How about one of those Halloween decorations where it looked like a witch on a broom smacked into your backend.
Christmas wreath..on the grill?
Intersesting details, and with a little work, could be done.