Hello, I'm in the supermatket...

Story of a Sainsbury's check-out worker who refused to serve a customer until she finished her mobile 'phone call has generated a lot of comment.  So - whadya think? Yes, it was the height of rudeness on the part of the customer, and there's a lot of it about these days, but the fact of the matter is that going through a supermarket checkout is not - or at least doesn't have to be - a social interaction. There's usually no need to say anything to the checkout worker, and apart from "Do you need any help with your packing?" rarely any need for them to say anything to you. So should the checkout worker have simply ignored the customer and got on with it?