Depends on the state and city, there's no federal law. Madison Square Garden (notoriously) use facial recognition to ban all lawyers from their venue who work at firms engaged in active litigation against them. This was upheld in May [1][2] since in NYC you can collect biometric data for commercial use without consent as long as it's signposted and you're not selling the data [3].

[1] https://law.justia.com/cases/federal/district-courts/new-yor...

[2] https://news.bloomberglaw.com/litigation/madison-square-gard...

[3] https://codelibrary.amlegal.com/codes/newyorkcity/latest/NYC...

Gee, I wonder if some self righteous asshole is "lurking about...week old comments" So they can make themselves feel better by blathering on for no apparent reason.

I guess we'll see, won't we?

I don't know about case law, but when you walk into a grocery store, it certainly becomes their business!

Where's the case law and precedent that says your business is only your own, even when on a public sidewalk or in a grocery store? If you're going to make such unreasonable demands, can we start with your own claims, since you made them first?