Most people do this. In today’s world it’s difficult not to because so much of it (the world) is filtered through one screen or another, via images or video that other voyeurs have recorded for us.
It is exactly like this scene from Don DeLillo’s White Noise, which was published back in 1985. Maybe you’d like it, @Mantralantis.
Murray is commenting on the photographers, who he says ‘are taking pictures of taking pictures’ – but of course Murray is also a sort of voyeur, and the narrator (Jack) is yet further removed as he watches Murray watch people watch the barn, and then the reader is on yet another level, and so on and on, and you can see how it becomes ridiculous and recursive very quickly.
In terms of the ‘type of person’ that your question is asking about: maybe the type of person that does this (watches watchers) is one who pretends to be above the longing we feel for participation, whether it’s participation in a myth or a cultural experience a social movement, or what Murray calls a ‘collective perception’. Or maybe there are other reasons.