At first I thought my opt-out would be recorded, but most of the airports through which I've flown do not record anything about the opt-out. They just pat down

At first I thought my opt-out would be recorded, but most of the airports through which I've flown do not record anything about the opt-out. They just pat down the subject and try to keep the lines moving. I no longer believe this is an effective way of registering my opinion.