Why oh why do people ever use maiden names as security?
Banks have known since at least 1980 that any security based on maiden names, pet names chocolate bars, words in a dictionary is false security.
It provides an easy route for people to hack into accounts and is worse than useless.
Why worse than useless?
Because it allows the naive to think they have a form of security in place when in fact they have left the front door wide open.
As we have gained from the past, we owe the future a debt, which we pay by sharing today.