I have it on reasonable authority that at least one X.25 era hacker has exploited ye-olde travel provider interfaces to:
A) automatically detect and utilize cheap global routes
B) brute force discount codes for global hotel chains
Care to elaborate? I am missing context here. Do you mean a Google Flights employee is that hacker? Or is X.25 accessible to anyone with an Internet connection and knowledge of ye olde software running on green phosphorescent screens?