i think it's an interesting social experiment and shows the sense of entitlement most americans have. "I'm having a private conversation"... outside in front of a starbucks. brilliant.
I don't think that's showing a sense of entitlement.. I think it's showing what invasion of someone's personal space does. I know I personally would not appreciate some random guy coming sit at the table I sit at, not introducing himself or anything, just sitting there filming me and refusing to stop. It's weird, it's creepy, and most of all it's an invasion of personal space. I don't know that I would have the kind of reaction some of these people did, but I do know I would get pissed off if I asked someone nicely several times to leave my personal space and they didn't.
That being said, the video was funny as hell