[raybbr]

Why on earth didn't the "students" just tell them who they were with. I would sure want to know that if anybody stuck a camera in my face and started asking questions.......

That might be true if they were engaged in conversation. Remember his first instinct was to slap at the camera and then start asking "Who are you?"

Had he simply said, "Before I answer any questions I'd like you to identify yourselves" he would be in good shape.

[basil]

Yes, if he had said something like that—and not touched them, he’d be in the clear.