Earlier quoted context omitted.
I bet you'll love these before-and-after photos of Sao Paolo after their outdoor advertising ban: https://99percentinvisible.org/article/clean-city-law-secret... Anti-advertising was one of the pet causes of Generation X, back before more pressing things like "the war on terror" and a financial collapse and health care crisis took the stage. And those are bigger deals, but man, advertising is just awful too.
Signs are ugly, but I don't think it's right to tell people they can't have a sign on their property. Property rights and freedom of speech are worth tolerating a bit of eyesore.
If not then I think it's reasonable to restrict (time, place, and manner restrictions are recognized as being consistent with 1st A).
But maybe you can think of some value I can't.