This is just puritanical, judgemental idiocy at its most pointlessly discriminatory. Even for felony offenses it often veers into the same territory but flatly refusing to hire people for fucking misdemeanors with absolutely no relevance to most of the work involved? What a closed, almost hatefully punitive mentality some employers have. I can't put myself into another's shoes or context of needs, but if I ran a firm that subcontracted employees to other companies, who then refused to accept them for some half-assed DUI from years back, I hope I'd have the decency to fire that client instead.