I think the key is you weren't some prestigious duke that everyone knows. You were banned as a de facto traitor.
But please understand, I understand your reason and logic in having your guy demand being called lord due to a previous lordship, my Character thinks your character is missing a few screws.
But it's a moot point because frankly you can do as you please and really it adds to the rp so why not. I wouldn't do that but hell, worse things have been attempted.