"And have your car vandalized. SOME of them can read english."
Nobody's vandalized my car. And I haven't had any problem finding buyers for the sticker; I've shipped over half my first printing of 500 to places as varied as Southern Kalifornia, Tucson, the Chicago suburbs, and suburban New Jersey.
Evidently some Americans are just more interested in their kids' future than you are - and willing to stand up for their kids having a future better than the Third World. You, though, are less worried about your kids having to go to ever-more-overcrowded schools in trailer classrooms than some slight imagined risk to your car.