[scripter]

I haven’t flown in 15 years and was wondering: what if thousands of people purchased fully refundable plane tickets and canceled at the last minute (whatever that may be). And did this over and over again. If this has any merit, the airlines would really feel the pain and not the TSA, but it’s all I can think of at this time.

[Sarajevo]

I haven’t flown in 15 years and was wondering: what if thousands of people purchased fully refundable plane tickets and canceled at the last minute

I haven't seen a "fully refundable" ticket in years. There always seems to be a penalty involved in cancellations.