The issue is of course the extremely broad definition of 'public' in the US which includes virtually everything but your bathroom.

If someone calls the police on you because your paranoid or racist neighbour caught you on their doorbell camera and called the cops because he thought you looked like you 'didn't belong' in the neighbourhood that happened in public, but it's obviously extremely problematic and a recipe for self-imposed policing virtually everywhere.

And that's not actually a hypothetical but something that already happened. (https://www.vice.com/en_us/article/qvyvzd/amazons-home-secur...)