He kept getting freebies and discounts on his after work shopping trips and he didn't realise why until he caught his reflection in his mirror and realised his police lanyard was showing, people thought he was a cop!
He also on more than one occassion got pulled over for breath tests and/or speeding only to get flagged on when they saw his lanyard. He reckons he would have looked like a sergeant(? Can't remember exactly) due to his suit and the car he had and the cops wouldn't have wanted to piss off a superior.