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Excerpt of a monohedral 11-gon tiling of a non-compact surface embedded in 𝑅³
(media.mathstodon.xyz)
I find this idea very interesting even if it might seem kind of wacky and unrealistic in our current world.
I can see it being possible to make a somewhat-convincing "moral" case for banning advertising. The argument would go that advertising is manipulating the consumer, preventing them from making an unbiased decision. It provides an unfair advantage over the competition, since a company that spends on advertising can get more sales without improving their product or lowering prices. And it creates an environment where the competition has to respond with advertising of their own, with the end result being large advertising budgets when those resources could be used to improve the company's products or services. The case would be much weaker when it comes to small businesses, charity fundraising, political adverts and government campaigns. To be clear this is a thought experiment, no criticism of anyone involved in advertising in real life.
You can make a distinction between paid and unpaid advertising, for example a community noticeboard or directory where businesses can post for free is more acceptable because they're not gaining any unfair visibility over competitors, and consumers would only go there when they're looking for something. Like a few other people have said it would be essential to propose alternative ways that consumers can discover new products. Sadly there are probably people whose only source of information is advertising and you need to somehow give them a way to stay informed.
More realistically, limitations on advertising are either going to take the form of making specific places ad-free like you mention, or restricting advertising of certain products, kind of like how many places already ban adverts for things like gambling, tobacco, alcohol or adverts targeting children. I could easily see this being extended to anything remotely controversial, like social media or fast food.
Goodbye