Sure it is. We used to have crimped laundromat coins and if you put it in backwards, it wouldn’t work. This was baffling to people.

You’ve already made a significantly healthier assumption than that strangers seeing you in need want to lie to you.

I say “used to,” because we switched to a combination you enter on the door handle and they still can’t figure it out. Now they tell me there aren’t any buttons on the door handle.