>or that airline from 80's that took back through technicalities the "lifetime" ticket, no

As far as I'm aware American Airlines only revoked two lifetime AAirpasses of the 60+ sold; both were accused of using their companion pass fraudulently. From what I remember one was accused of approaching people at the airport and attempting to sell his companion seat, the other was accused of using his companion pass to book a seat next to his for a nonexistent person so he wouldn't have to sit next to anyone.