A good point that shouldn't be dismissed so quickly. This tracking also has little use beyond surveillance, so one has to wonder what is it that the author thin

A good point that shouldn't be dismissed so quickly. This tracking also has little use beyond surveillance, so one has to wonder what is it that the author thinks they are doing, or why they think it's interesting or useful. That they then go ahead and film a crowd without their consent is more telling of their position on this moral question than it is any direct harm to the people in the video.