Agreed. Oh, and don't you even begin to let thoughts of slightly reclining your seat enter your mind, lest you disturb the delicate and far more valuable (than yours) sensibilities of a tall person behind you!

As a shorter guy, I have on rare occasions felt looked down upon (figuratively AND literally) by tall people--mostly a few bad eggs--who seem to believe that their genetic lot in life somehow entitles them to treat shorter than average people with disdain and as inferiors.

That being said, while I do think it is absurd for someone in Y to expect someone in F to switch seats with them, I don't see any of this as life and death. I would not entertain the idea of switching from F to Y, but [edit] simply being asked [/edit] wouldn't ruin my day or my travel experience like it seems to for some people.