Wow, you guys put a lot of thought into this whole windows-up windows-down thing.
I wondered the same thing about Max A/C when I was a kid. Our AMC Hornet (yeah, baby) had a label on the knob that said "Max A/C - Desert Only" or somesuch. I spent many a family vacation (of the non-desert variety) wondering from the back seat what would happen if we turned it on.
I was pretty disappointed when I got older and realized it was just a recirc control.