They tried that in a few places, it usually just translated to "black people can't own guns" or discrimination based on the screener's impression of that person. "Screening for temperament" is akin to literacy or other such tests before voting.
Anyone can lie/spin a form test, similar to the customs form you get when you fly into the country, everything else is subjective and grounds for a discrimination law suit.
They tried that in a few places, it usually just translated to "black people can't own guns" or discrimination based on the screener's impression of that person. "Screening for temperament" is akin to literacy or other such tests before voting.
Anyone can lie/spin a form test, similar to the customs form you get when you fly into the country, everything else is subjective and grounds for a discrimination law suit.