At some point the cost of the meter exceeds the value of the product being metered. This happened very soon after hotels really jacked up telephone bills. Somehow they decided not to stop being silly, simply to bill the ignorant or lazy and airlines look to be cut from the same DNA: we're maybe going to wind up with viable cellular comms inside aircraft that bypasses the airline.

"Stealing" ip flows over Port 53 isn't the way out, the path out is having RF which doesn't flow through the airline's base station.