I’ve never once submitted to it. Opt out every time.
Here's the page on the TSA's own website confirming you have the right to opt out of the facial recognition scan.
Bring this with you next time you fly so you can tell them to fuck off if they give you a hard time.

https://www.tsa.gov/news/press/factsheets/facial-recognition-technology
Discussion
Ever gotten pushback, or do they typically know the drill?
I smile and say “I’m going to opt out.” They often look surprised, but only for a moment. They know the drill.
once when boarding a plane with my entire family(with very small children) they told me if we wanted to opt out. I’d have to bring someone over to do a manual security check.
I said if that’s what they wanna do, but I wanna opt out. And then another agent said just let em go through and they let us.