Just ran into this in Aruba with several merchants. Not ONE had any idea how to charge me in local currency. They were all small enough charges that I let it go, but yes, this is very alive and well. Same crap in Dublin earlier this year. It's just all automatic and the clerks either stare blankly or even get agitated (if they are busy) when you question it. Certainly for a larger charge like a hotel bill or car rental, I wouldn't let it slide....