Like a lot of things, if you think you have a reasonable request, you probably have to ask for it. If you had talked to a CM after you got off and explained why you were upset, they might have given you one of those courtesy FPs that a lot of them carry around.
I remember once being stuck on IASW at DL for about 45 minutes. When they finally got us off, they gave everyone a FP to use on any ride, but when I said that I thought we deserved more than that because we had missed the better part of an hour of prime morning touring time and would have been able to do more than one ride in that time, they gave us two FP's each.
I also got vouchers for a round trip flight from Air Tran when I sent a letter complaining about being stuck in the airport for 8 hours past our scheduled departure by a mechanical problem. My biggest complaint was about the inaccurate information we were given.
My attitude is that it never hurts to ask.