Would you say that Ads are still unethical if they're not paid for? As just an anecdote, I'm always shocked by the amount of advertising at Burning Man. There'

Would you say that Ads are still unethical if they're not paid for? As just an anecdote, I'm always shocked by the amount of advertising at Burning Man. There's always people trying to get you to come to their event or join in their activity. Signs and street barkers are everywhere. There's no money and no bartering allowed, but advertising is everywhere, since ultimately attention is what is in limited supply. If they aren't unethical in this scenario, it seems like what you're saying is that it's the underlying socio-economic system that's unethical, which would explain why all of the alternatives to ads also appear to be unethical.