Only done it once, and that was by accident.

Was getting seated in an Economy Extra seat on a SAS Airbus A340, where the button is on the small remote that stowed in a small "pocket" on the inside of the armrest. I simply pressed the button with my thigh while sitting down, and not before my a** was planted in the seat, a female FA came to ask what the matter was.. "Oh, did I press the button? Sorry, that was an accident, I'm really sorry". "Oh, not a problem at all", she smiled

For the rest of that flight, drink services were to frequent for me to ever need to push it again.