Once the disable button is pressed, anything that can keep it IN, will permanently disable the feature. Whatever you use to hold the button in, tooth pick, piece of card stock, whatever, can be quickly removed when you go in to the dealer, so there is never any question about altering the factory features. What they don't know, can't hurt you.
Cost? Zero $
Installation time? Less than ten seconds.
Effectiveness? 100%

Cost? Zero $
Installation time? Less than ten seconds.
Effectiveness? 100%