Thanks for the info! Definitely didn't realize Disney does not condone this! I certainly am not trying to get away with doing something that is not allowed. I may ask politely if it is allowed if I am at a kiosk but I will not expect it and certainly would never demand it. I just heard that it was an option on a Disney related podcast. But then I saw a facebook post stating it was not available to do at the kiosks only at certain other locations (like gift shops, etc) so that is why posted the question.
I do know the cast member at the Contemporary gift shop happily allowed my mother in law to trade her last QS for three snacks last Christmas. She was friendly and helpful so I thought this was an acceptable practice. But I guess not!!