A stick figure family decal for parents who really didn't do that good a job.
No pets? Or did the junkie sell them?
Hey look, our mom and dad got a car decal! As soon as the obnoxious stick figure thing started profaning the rear windshields of cars everywhere, it created an entire industry devoted to mocking their wholesomeness. This one might take the cake. We hope it was actually applied by parents who are willing to let you think their kids are strippers and junkies for the sake of getting a laugh in high-speed traffic, and not by the parents of an actual stripper and junkie who just want to warn you what could happen even with the best intentions. Or it could have been applied by two people who misunderstood the whole stick figure family genre and thought these stickers were supposed to tell a couple's "How we met" story.
Sources: Redditor deartragedyx3