No, this isn't about what you think... There have been times when I've used my miles to 'buy' a ticket for my wife but gambled on getting a CPU with my 1K status for me. So when I don't luck out, my wife ends up in the C cabin with me back in eco+. Now, my wife really doesn't need a wide seat with lots of legroom since she is only 5'2" and she hardly ever touches the food on UA (but that's another story...), so she wouldn't mind swapping seats with me so that I could enjoy the advantages of business. Has anyone tried to swap seats like this? What is the reaction of the crew?