Originally Posted by
snaxmuppet
It isn't shutting the stable door if they refuse to carry you permanently! That is their most severe action I suspect that is easily open to them without resorting to the courts. Obviously that would only apply to the worst of repeat offenders but it is quite a severe result if you end up losing status along with all your Avios. IIRC, BA has done that in the past for other breaches of their CoC.
The CoC doesn't mention permanent refusal of carriage, just refusal of carriage (which reasonably would be taken to be related to the itinerary booked). That said it isn't explicitly specified either way, so I guess that it could be possible to argued either way.
However an airline which permanently refused all future carriage to all passengers who dropped legs, segments or returns would surely be cutting of its nose to spite its face.