I can't even begin to comprehend how you got to that conclusion. Recording someone with a cell phone is a terrible analogy of being completely disrupted from camping.
While the cell phone video is more extreme, it's to prove a point that while in public, you have no expectations of privacy.
Maybe I made a mistake in reading Bob's comment, but no where did I read anything about any legal standing. Since the legality of there behavior wasn't brought up, I don't see how that is an issue.
Well that's based on your personal upbringing and etiquette. While I agree and would abide with your personal etiquette, it doesn't mean that others have to. So the LAW is the best option that both sides have, to settle this dispute....unless you want to go lawless and take this to a shouting match, then maybe fist fights....then knife fight....then gunfights?
How do you conclude that the noisy people suspected that Bob was "packing heat"? Maybe he was or maybe he wasn't. I can't begin to make the leap of suspecting Bob had a gun. And so what if he did? If he did, good for him. If not, then good for him, too.
Well he said he screamed at them for "10 minutes"... an elder man vs. 6 adults and 8 kids? That takes a lot of balls, so most would think that he's either armed or is looney and has a death wish. Just so happened that he yelled at people who were civilized and they backed off. Try having a nice, quiet picnic at a park in the ghetto....and dudes come around with loud music and loud cars....think nothing's going to happen if you try to yell at them like this?