I don't mind people who use them while driving (it's not perfect, but at least they're not fumbling with something in their hands)...but I'm just amazed at how many people will continue to carry on a conversation with someone on the phone while dealing with a cashier or food service person. It's just rude.

I was in Chipotle, and as usual, things go like clockwork - the guy in front of me had a BT earpiece, and was just yakking away, and the folks behind the counter had to keep trying to get his attention. Now, Chipotle isn't like the Soup Nazi (it's the customers that will throw you out if you slow the line down)....but he kept going back to the conversation every time.

By the time he got to the toppings, they asked him (AGAIN) what he wanted, and between grunts and nods (still talking full speed on the phone), he stopped and said - NO CORN! I DON'T EAT CORN!

The folks behind the counter were gracious, threw the item out, and started over - but the guy on the phone said to the person on the other end of the conversation, "Man, they messed up my order AGAIN! They're always messin' up my order."

If it were me, i'd be doing more than messing up his order.