Combined with the idea from the article to offer two distinct networks (one traditional, private, WPA2 and one open, only allowing VPN connections out) this sou

Combined with the idea from the article to offer two distinct networks (one traditional, private, WPA2 and one open, only allowing VPN connections out) this sounds like a very practical idea. Is there any good reason not to do it this way other than to protect financial interest of mobile carriers? A very paranoid regime could even establish rules to only allow certain accredited VPN providers (e.g. ISPs) to free people who offer open WiFi from the fear of being prosecuted.