[smnrchrds]

> A new email address and PO box is a new person.

Not to airlines, which have your full legal name, date of birth, and passport number on file.

Not to big tech either, which are in practice giant surveillance companies and have mastered the art of tracking everyone and anyone on- and offline.

> Was there ever a precedent of an airline ban over a chargeback where a refund was warranted?

I don't know. But many people would not have the time to research this to their satisfaction, nor would want to risk it and find out the answer the hard way.