Indeed, why? I say we start there and then keep going. I'd be perfectly willing to go as far as banning all paid advertising. Surely humanity could find something useful to do with the trillion or so we spend on advertising, PR, and related manipulation. But let's start small and see how it goes.
I think I remember a comedy video where somebody went door to door speaking and messaging in the manner of online advertisements. Probably also perfectly legal (despite any "No Solicitors" signs on front doors) and something that would only be part of a completely horrible world.
