<p>During tournaments, some of the teams at our hs would paint up the cars that were "caravaning" to the games. It was a spirit thing. </p>
<p>Different teams also sold bumper stickers/magnets to raise money. They were only a couple bucks each, and most people would buy them and toss them. It was mostly the parents who might actually put them on their car.</p>
<p>Then there are the AAU, Extreme Cheerleading, Club/Comp Soccer, Elite Sports... all these quasi-private teams that go to tournaments all over the state. Sometimes it's their bumper stickers and magnets we see.</p>
<p>I always thought the "my kid beat up your kid" bumper stickers were really obnoxious. Some form of redneck humor I guess.</p>