I'm not a security guy, so I'm at a loss with analyzing whether it makes sense or not. It did occur to me, though, that I would not want to be the clerk asking

I'm not a security guy, so I'm at a loss with analyzing whether it makes sense or not. It did occur to me, though, that I would not want to be the clerk asking for ID if the guy on the other end of the counter had just mugged somebody at gunpoint and was now looking to buy something so he could go down the street and pawn it to purchase drugs. But I can definitely see the other side of the argument too.