The courts already distinguish "commercial speech" as a class of speech. Would we prevent all forms of commercial speech? What about a waiter asking you "would you like to try a rosé with that dish? It pairs very well together." Is that "advertising" that would need to be outlawed?
What about giving out free samples? Is that advertising, and thus should be illegal?
What about putting a sign up on your business that says the business name? Is that advertising?
I hate advertising and propaganda. But the hard part IMO is drawing the line. Where's the line?
Rule of thumb, all aggressive unwanted information.
Clear? For sure not, like you said. But I am considering (rather dreaming) moving to La Palma, a vulcano island that banned all light advertisement (they did so, because of the observatories on top, but they are cool).
Still, a city without aggressive lights would be nice. Some lights are probably unavaidable in big cities, but light that is purposeful distracting, should be just banned.
And online is kind of a different beast, as we voluntarily go to the sites offering us information (but thank god and gorhill for adblockers)