I can see one potential reasonable use…

About 15 years ago I took my wife to Disney World because she’d never been and wanted to see it. Our last day there we’d seen/done everything we wanted, so we decided to get into a two hour long line for one of the most popular rides.

During the wait in the line we got to recognize pretty much everybody around us through small talk etc. Lots of parents also had to apologetically take kids out of the line for bathroom breaks, and would come back to their spot a few minutes later.

Disney has a special priority lane for most rides, and they have employees where the two lines merge to ensure the priority line isn’t abused. About 5 minutes before we got to that merge a woman with two kids appeared right in front of us and tried to strike up a conversation. We hadn’t seen her before in the two hours we were in line and had no idea where she came from.

When we got to the merge point with the priority line the Disney staffer stopped letting anybody through. A couple minutes some Disney security appeared from a hidden door, spoke to the woman briefly, then escorted her and her kids away. The staffer at the merge point then asked us if we knew the woman and apologized for the delay when we said we didn’t.

So clearly Disney was monitoring the line for people trying to cut it. We never saw cameras or employees, but clearly they were there.

If facial recognition was used solely to aid in identifying potential line cutters like that then I wouldn’t have an issue with it. But its usd would have to be for very specific cases like this. Unfortunately I don’t think corporations like Disney can be trusted to do so on their own…