At Disneyland, there are separate park entrance lanes that don't use facial recognition software. I like that I can opt-out passively there. At TSA checkpoints at the airport, you have to actively ask to opt-out. I'm always worried that actively opting-out puts you on a government list and there could be later, much larger ramifications, so I passively opt-in to blend in with the masses.
I enjoyed that. I will remember to opt out again.