That was quite impressive, you spent the whole time bemoaning celebrities that you failed to point out why you would have the right to film someone against their wishes in a private establishment.
Police should wear a cam because they are individuals in a profession that is going to put them in a situation at some point where we need to know what happens. Not want to know. They are going to be put into a position where they might have to fire their gun or use other physical force. We need to know if that's justified or not. It's a way of watching the watchers. It's a way for the Police to get some vindication when they are falsely accused of doing something wrong. There's so much benefit to it as a public servant that it makes sense. We don't require them to wear it home.
Performers are being a bit ridiculous in not wanting to be recorded, but I do kind of understand it. They don't want to be distracted with flashes during a performance, they don't want their material leaked and stolen online, they don't wan't a joke taken seriously that was highly inappropriate. They know it's inappropriate but a good comedian might tell it anyway to emphasize a point, shock people. They don't want it taken out of context.
You only want to record them. Take a step back and think about it for a second. Do you have to allow me into your house with a video camera and record everything you do? Maybe, but you sure don't have to let me. You don't even have to let a police officer into your home with a camera, they would need a warrant. So why you as a public citizen who rented a space can't deny people from entering your rented venue can't deny it.
Now you go and learn how to properly debate instead of skirting an issue and changing the subject.