I've traveled close to 100k miles/year for ~8 years and have opted out successfully hundreds of times. When they ask why, I just stand quietly. I used to explai

I've traveled close to 100k miles/year for ~8 years and have opted out successfully hundreds of times. When they ask why, I just stand quietly. I used to explain the legal and moral implications but the mall cops - I mean TSA - don't care. And for a fun alternate strategy: instead of opting out, if you just say "I can't raise my arms above my head," you can skip all of it. You don't even have to explain why because they're not supposed to ask. You'll go through the metal detector and get a hand swab and you're done. Most of the time, I get through to the other side before my bags.