I've worked for twelve years in various roles that involve dealing with customers, and their idiocy never ceases to amaze me. But if I had to pick one, it would be a customer in a nightclub in Scotland about ten years ago. Apologies for the bad language, but it's somewhat integral to the story.
So the customer, a guy in his thirties, walks up to the bar, orders a couple of drinks, and pays with a tenner. I hand him his change, which he closely examines, and then drops on the floor as he ham-fistedly attempts to put it in his wallet.
"Give me my change" he says to me, with an air of menace.
"I already have."
"You threw it on the floor. Give it to me again."
"You dropped it. Pick it up."
"You pick it up."
"No thank you."
"Pick it up or I'll kick your head in."
So I take the drinks he ordered, and pour them down the sink.
"Okay, problem solved. You're not getting served again in here tonight, here's your tenner back, I'll pick up the change later."
"I'm not getting served?"
"No."
"Why not?"
"I don't have to tell you why you're not getting served, but trust me, you're not."
"I think you have a moral responsibility to tell me why I'm not getting served."
Well, this was an unusual tack, even for a customer. I take my moral responsibilities very seriously, however, so replied:
"The reason you're not getting served is because you're a fucking c**t."
The customer is not satisfied by my response. In fact, he turns a rather amusing shade of crimson. And demands to see the manager.
So, my manager Alan rolls up, and asks what the problem is. The customer reels off an impressive piece of fantasy, along the lines that he was quietly and meekly going about the business of buying some drinks, when I throw his change in his face and mock him.
"... and then, he called me a fucking c**t. So what are you going to do about it?", jabbing his finger in to Alan's chest.
Now, I never got on with my manager, but for what he did next, he will always be dear to my heart.
He removed the customer's finger from his chest.
"Nothing."
"Why the hell not?"
"Well, I want you to know that I've listened carefully to everything you've said, and after considering your complaint, I've come to the conclusion that you are a fucking c**t."
The customer goes mental and grabs Alan, but by now a couple of bouncers had come to see what was going on, and they drag him, kicking and screaming, from the building, and eject him on to the frozen granite streets of Aberdeen, apparently with some force.
So while I agree with the point about mandatory National Customer Service, I'd like to add that anyone who's had to put up with customers for years should be given six months in a nightclub in Aberdeen, where you can say what you like to the customers, in order to blow off steam.