And to those who think 0.01% may sound like it'd be a rare occurrence, LAX, for example, averaged 164k passengers per day in 2006 which means approximately 1643 of the passengers were in this 0.01% minority. 1643 occurrences per day is quite common.

I've also been frequently flagged in the past for not fitting in the TSA's narrow gender model to the point of getting Precheck at the cost of my privacy and money. It's very frustrating.