I have not read the full article, but I'm not terribly surprised.
A lot of people are willing to "bend" the truth quite a bit or lie about things they don't think will hurt anyone.
As a minor example, take the guy who likes to home brew craft beer. He enjoys having a beer most evenings, maybe even a couple on the weekends. When he puts that down on his yearly medical exam survey, his doc tells him that if he had put any higher number, they'd have to automatically refer him to a substance abuse counseling program. Do you think he is going to answer accurately next year, considering the negative effects of such a mandatory counseling program would have on his security clearance and ability to do his job? He's not a drunkard, but by AF medical rules, he is very close to incurring some serious negative actions.