Most concerts don't have jumbotrons, though, and a jumbotron at a sporting event that is highlighting fans who are dressed in team colors is very different than just focusing on random people. There's a lot of ink that's been spilled on the creepiness of "kiss cams".

It can be both wrong to cheat, and also wrong for us as a society to act as though being outside your home is consent for people to take videos of you as a subject. We should all have the right to exist without being someone else's entertainment or content.

Was it dumb for them to be there together? Yeah, though mostly because it's dumb to cheat.

I am not sure how much this incident has to do with facial recognition or media surveillance.

I think this situation is a horrifying lens into just how much surveillance and social media sharing of strangers people are accepting of.

You say, "you can reasonably expect hundreds of cameras owned by both individuals and the venue" as though there's nothing wrong with just recording everyone that is in public. Incidentally catching someone in a crowd is one thing, but zooming in on and singling people out is another. I don't think it's a particularly long leap to get from your quote to, "it's reasonable for police cameras to see you and know where you are if you're out in public".