That's surely true. If you show up without your card, all bets are off!
If someone makes a reservation with the intention of getting the AAA before check in, I don't have a problem with that, so long as they actually do it or are prepared to pay rack. It's hard for me to criticize the people who book AAA and take up inventory though. Heck, I do that all the time. I'm currently holding an AAA reservation even though I hope to be able to switch to AP, or even though I know my dates aren't totally locked in, so I'm kind of guilty of taking an AAA reservation that I *might* not use out of inventory and potentially depriving someone else of getting it.