I don't want grocery store circulars on my front porch. They're trash, they're bad for the environment, an eyesore, literal physical spam. But our municipality can't ban them, because First Amendment jurisprudence says so. The circulars are speech and expression at their nadir of protection (commercial speech not of any public or artistic interest), and they're protected.

Good luck getting in the way of political advertising, which is speech and expression at the apogee of its protection.