The trend she's complaining about (rightly, in my opinion) is people filming themselves trying to make other people uncomfortable, with the justification that other members of the public are only NPCs, not real people, and so there's no moral problem. She gives several examples (although she does also give one example of what you're talking about, which is someone acting like an NPC, which is fine, if unoriginal).

I've accidentally come across many examples of people harassing other people as a "prank", and my impression is that the harassers have been late or deficient in developing empathy.