I am with others who say this whole game isdumb and would be easily resolved if TSA removed the silly and pointless ID check....
In the meantime, I hate battling a TA for a gate pass for whatever reason, so I happily save us all some time and do the refundable ticket thing. I feel no guilt as this product is legally sold on the open market. I am breaking no rules..
I have usually bought WN tix as they seem to be the cheapest and easiest to cancel. If I want PRE, I will do AA or DL.