[SturgeonsLaw]

Pay cash for your ticket, leave your smartphone at home switched on (even script some stuff if you want to make it look like there's activity there). Boot into a live CD, make sure you use a spoofed MAC address (does TAILS do this automatically?) and keep your face away from cameras.

Should be pretty bulletproof against all but the most capable adversaries.

[746F7475]

I mean, sure, if you don't have any people in your life who wonder why the fuck did you just vanish for a day.