I'd take a better seat but otherwise I'd say, "no thanks, I chose this seat because I planned ahead to secure a suitable seat for my condition. Ask 7D and 7F."

(I recently did a long flight trapped in behind an infant in a bassinet in front of what should have been Mr. M.T. Seat but Ms. I. Didn't Plannahead wheedled an upgrade to the bulkhead. I would have LMU'd if I had expected Mr. M.T. Seat to be relocated.)