Standard Tor, sure. But when you start using pluggable transports, like Obfs4, you can defeat pretty much every captive portal or traffic analyzer. I'm sure th

Standard Tor, sure. But when you start using pluggable transports, like Obfs4, you can defeat pretty much every captive portal or traffic analyzer. I'm sure there might be a way to detect even these. But remember that the real test of detection is the GFoC. Some piddly airline's offering of pay internet is not going to use nation-state level detection schemes.