I don't really see the point in this. It's a minor inconvenience and imo, shouldn't take up Dev time whatsoever. I think I've made the mistake maybe three times going back to NC 1 and each time I cursed myself for a forgetful fool. I didn't blame the game. The button is there to be used and it's your own fault if you don't.
In rl, if you forget your keys, you're locked out. So you train yourself not to forget.