Watch the video, yes there is a prompt.
1) It's WAY WAY too easy for someone to not really read this and just press Y to continue, like load setup defaults.
2) There should _not_ be a way of disabling the prompt (the popup even mentions you can do this.)
3) If ever there were a time for a simple math problem (like multiply two numbers and enter the result) to indicate a user had read and understood the prompt, this is it.
I think you are mistaken. I am presuming that the prompt is suggesting that you can disable the PSB security feature (in which case the prompt doesn’t show, which seems very sensible).