It's a prisoner's dilemma in the case where everyone controls their own wireless APs, sure.
In the case where the building is served by one major ISP, and they provide combination gateway+APs, I could see the ISP deciding to "solve" the problem by turning the whole building into one AP mesh (with only one AP actually active per unit sphere) where each client gets a VLAN with tagged QoSing over the last-mile "backplane" back to their own gateway.
Though, if you're going that far, you may as well just call yourself a WiMAX provider and tell people their gateways are just extension picocells for the network, rather than end-user equipment. Which is basically what you get already from the ISPs that offer "public wi-fi for customers at our hotspots" (i.e. broadcast by all APs on our business plan), except that said wi-fi would be the only product, and would be served by residential gateways as well.
In the case where the building is served by one major ISP, and they provide combination gateway+APs, I could see the ISP deciding to "solve" the problem by turning the whole building into one AP mesh (with only one AP actually active per unit sphere) where each client gets a VLAN with tagged QoSing over the last-mile "backplane" back to their own gateway.
Though, if you're going that far, you may as well just call yourself a WiMAX provider and tell people their gateways are just extension picocells for the network, rather than end-user equipment. Which is basically what you get already from the ISPs that offer "public wi-fi for customers at our hotspots" (i.e. broadcast by all APs on our business plan), except that said wi-fi would be the only product, and would be served by residential gateways as well.