This campground is "owned" by San Bernardino County. They actually do a pretty good job of taking care of it, except perhaps the bathrooms. There is a barbed wire fence surrounding the property. It was cut this time around and I notified the staff. They were out there the next day repairing it. I was impressed with that, since I know they have a minimal budget. They close this campground 2 days a week to save costs, that's how tight it is right now.
I am not keen on leaving stuff out (like water) to encourage these people. There are plenty of places to help them, and they know it. They typically don't want to interact with others and want to stay off the grid.
As far as cameras, they are not at all useless. I want to know who or what is outside without going out there. I want to know if anyone actually went through my site overnight and if so was it a transient or another camper? If I record a theft or something else, I can give it to law enforcement so they can make an arrest. They can use it for evidence if need be.
I can see the barking dog speaker going off all night when coyotes come through. I don't think the neighbors would like that and the crooks wouldn't pay it any attention.