Not to mention the fact that maybe they weren't actually that drunk. Maybe they were just dickheads using alcohol as an excuse?
Having worked with one of the 6 if the other 5 come in at his level then I'd have to say we are talking intellectual sharpness at the level of a bag of marshmallows!
From memory he got the sack for trying to help cover up a punchup between some other workers, CCTV quickly foiled that attempt and the lot went out the door never to return.