It's pretty clear you have never in your life "brainstormed" anything as a defined process. I have. Also not sure where the hate is coming from
Don't take it personally, the hate is against these types of questions in general. Far too many of them make you try and remember stuff that happened 30 or 40 years ago. I can remember one teachers name from high school, but couldn't spell it so it's useless as a typed security answer.
There's also a secondary random hatred that comes to mind when talking about these questions, middle aged people who still talk about stuff from high school....

Back to the first group of questions, they can easily be modified so they can't be used for identity theft.
What are the last 2 digits of your SS number?
What are your mothers' maiden initials?