A lot of comments seem to be way off the perspective of the original post:
Roddiman 64 wrote in post #13642417
Is there some general rule about taking pictures in a public park, no admission, with a "white lens"? A staff person for a popular sax recording star ran off the stage and started screaming about me taking pictures and threatened to have me arrested. There were at least 2000 people,almost half of which had various cameras clicking away. Probably, I was ONLY one she saw with that lens, but I certainly was not the only one with a pro level camera. Does anyone know the rule, if there is one? I thought public outdoor park amphi theater all restrictions were off. (She saw at least 50 yards away)
Public performances in public parks are pretty common, and in those settings, well, taking photos is neither an invasion of privacy nor "trespassing", it's just common.
The person who hollered at the OP was not an "official" and so had no authority to stop the photographer. The person who was ranting, if we just take the story as presented, was just being, well, a jerk. Taking photos of a public performance, well, that's part of what happens with public performances!
Now, if this was a "venue", like a club or auditorium, then there may be "rules" about photographic gear -- that happens all the time. And, if you break the rules, someone with the actual authority will likely ask you to leave, and if you refuse, the cops could be called and things will not be good for you.
But this story is about a public park and a public performance. If you don't want your picture taken, stay out of the picture!