How is the average person on the street know the fare rules. Get real. I don't know the specifics of all the fares I buy, and I know a hell of a lot more than the general public.
This shows my point in Guava's post. 1 employee is trying to be helpful and at the same time make AC $145 bucks on a seat that was going empty, another would rather piss off a customer. That (airport) agent should be fired or atleast demoted to a station attendant cleaning lavs.