Ugh, this exact thing happened at my local market. I found out they were doing it from a news article, not from them. I straight up stopped shopping there. I drove a little further to a different store that doesn't use that tech. It's annoying, but it felt like the only real move I had. They won't change unless it hits their bottom line.
And here I was, feeling all noble for boycotting my local grocer over the same thing. My BIG plan lasted until I realized the next store is a twenty minute drive and I'm just lazy. I tried to stick with it, but when I needed milk at 9 PM, I caved HARD. Now I feel like a hypocrite every time I walk in, but my car thanks me for the shorter trips. It's a weird spot where my principles crash into my comfort, and comfort usually wins.
Feel exactly the same way about this face scanning mess. My local store started doing it last year, and I only knew because a friend sent me a link. I was so mad I tried to switch stores, but like @john_jenkins said, the next one is way farther and I keep going back out of habit. It's frustrating because you want to take a stand, but life gets in the way sometimes. Now every time I shop, I wonder what they're doing with my face data, and it creeps me out. We should not have to deal with this sneaky stuff when we're just buying groceries.