Of those stick figure family stickers everybody and their mother has stuck to the back window of their personal vehicle.
I’m not exactly sure what sets me off about them, except that maybe it’s because every time I see one, it’s been applied to the rear window of some oblivious-to-the-rest-of-the-world jackhole who made some stupid traffic maneuver. Or, they’re the ones at the light who have to be prompted to look up and see that it changed and they can go now.
However, these, I could stand.

(click to enlarge)
There are 35 to choose from, including a couple for pets. I’ve got mine already picked out. And I’m putting mine on the right corner window, just to be an ass. That, and because when I pass the stick figure oblivions, that’ll be the corner they’ll see first.