Stunnel and Airline Wi-Fi
In the USA this would be a violation of the CFAA https://www.law.cornell.edu/uscode/text/18/1030. Specifically, the router is a "protected computer" and the procedure described here is "exceeding authorised access" because it routes packets around a mechanism that was designed to stop them. Maximum penalty 5 years.(Some might argue that it was authorised because the computer let him do it. However the CFAA simply doesn't work that way. "Authorisation" is what the designers intended, and the initial paywall made that intention perfectly clear.)