McDonalds' employees don't even ask you whether or not you want to upsize, they just do it here in the Aiken, SC McDonalds. I have had this happen quite a number of times in the last few months.
Most people at the drive-thrus don't pay any attention but I certainly do and found that it is a habit rather than the exception. They also don't give you credit if change a drink to another drink. Say I want a milkshake instead of the coke with the meal.
They don't give you the coke and charge you the entire price for a milkshake. That is STEALING!!!
Product or Service Mentioned: Mcdonalds Milkshake.