Short answer: It'd be fine if you played it straight and managed to bounce with people who called your character out on it. If I encountered this, OOCly I would think it is amusing, but I would want to see more to the character than just a con-man gimmick.
Long answer: The main reason why lore-breaking concepts tend to put people off is because the players of such usually attempt to directly or indirectly force people to take on a certain perception of their character. When I say that, I mean a player writes a character and says "I want people to acknowledge my character as powerful an absurdly powerful thaumaturge who should be feared, so he'll be one of the only and one of the most powerful Black Mages around," or "People should acknowledge my character as important to the world, so in his backstory he defeated a primal singlehandedly and is the half-dragon offspring of Tiamat", or other such things. It's the literary equivalent of someone buying a trophy of a tennis racket and claiming that they won Wimbledon: trying to crowbar in a kind of acknowledgement while lacking the substance needed to back up or encourage people to genuinely make that acknowledgement.
So, as long as you don't do that--try directly or indirectly to force perceptions on others--then the concept is fine. Roll with the punches, have a plan for getting called out, and play the gimmick straight. Do that and it'll be fine.
Long answer: The main reason why lore-breaking concepts tend to put people off is because the players of such usually attempt to directly or indirectly force people to take on a certain perception of their character. When I say that, I mean a player writes a character and says "I want people to acknowledge my character as powerful an absurdly powerful thaumaturge who should be feared, so he'll be one of the only and one of the most powerful Black Mages around," or "People should acknowledge my character as important to the world, so in his backstory he defeated a primal singlehandedly and is the half-dragon offspring of Tiamat", or other such things. It's the literary equivalent of someone buying a trophy of a tennis racket and claiming that they won Wimbledon: trying to crowbar in a kind of acknowledgement while lacking the substance needed to back up or encourage people to genuinely make that acknowledgement.
So, as long as you don't do that--try directly or indirectly to force perceptions on others--then the concept is fine. Roll with the punches, have a plan for getting called out, and play the gimmick straight. Do that and it'll be fine.
