Jim,
Rather than go with the plain vinyl, cover it up with some random lettering that looks vaguely businesslike... Chances are they "caller" won't see the difference, but the cops won't be able to write a citation. Then after the 3rd or fourth time they are called, they'll just stop coming or cite the complainer for nuisance.
(either that or if you're feeling REALLY obnoxious, try putting stick-on boobies over it
)