I wonder if any just follow postings on APC forums - a few with some real consistent pathology here, but fortunately mostly are the non-flyers hiding behind the computer. In real life almost everybody I've flown with has been a real pleasure.
Look at the task from the employer's point of view, would you want extremes of personality such as the super-religious guy, the inflexible rule-follower, or the opposite anti-authority maverick on your team? Although crude these can give a taste of somebody's behavior and outlook on the world. It is probably not a bad thing that most majors conduct the test.