Hi I am very reassured that you think there is no such precedent for this, I mainly heard this online from various websites (points guy forum etc), the main examples I heard were of Delta adding individuals who had raised and won chargeback claims from the airline via their cc provider. I has also read that airlines such as BA and the major US airlines on a twitter profile of a high profile frequent flyer and reviewer that major airlines such as BA blacklist people who raise chargeback claims against them.

If this is untrue then that would be a relief, as it would seem unjust. I can understand if some chargeback claims are unjust but if the consumer has a genuine claim then it seems ridiculous. In this case BA were in the wrong from what I have seen.