> Try taking a photo of somebody with your phone. Usage will definitely look like you are snapping a picture, nobody walks around with phones straight up.

I urge you to visit any big city and see for yourself how wrong you are. I see it at least every time every day just during my barely 20-25min subway commute to work.

And that's the most unremarkable the most uninteresting place and scenario here. Any big park, any even remotely touristy location, any public square, any concert/sports venue, and even an overwhelmingly large proportion of restaurants are like that.