Of course, you have a problem when the owner of the wifi explicitly prevents anonymisation services. For example, when I was at Birmingham airport, I couldn't

Of course, you have a problem when the owner of the wifi explicitly prevents anonymisation services. For example, when I was at Birmingham airport, I couldn't connect to my VPN because they blocked domains of well-known VPN providers and even hijacked all my DNS requests so I couldn't circumvent so easily it. I guess running your own local DNS server which has your typical requests cached would solve this problem though.