I suppose that...never mind. I remember when my mother-in-law, who had flown many times, came out to visit us at age 86, and the cabin crew "didn't notice" that she was still in her seat. She was eventually found by the cleaning crew, while we were frantically searching the airport.

I'd suggest a short "sorry, but we don't think that would work" note, and scratch them off your support list. It doesn't appear that they want to be bothered.