They have to know only to achieve the goal of disabling the camera, but they would probably use it for everyone's, and hope for the best if they are desperate. I am not sure if you can tell if the camera has been disabled.

Pretty obvious by looking at them. Everyone has one of the same 5 brands, and the models are obvious when you see them.

By the time you’re close enough to see the brand, I would assume you’ve already been caught on camera.

Doesn’t matter. Someone can walk into jamming range wearing a mask, fire up the jammer, and there is no record of the B&E that happens 60 seconds later.

Wireless cameras are mostly a false sense of security for homeowners, much like a deadbolt on a door with a glass window in it.

At least you can talkback and confuse the cat while you’re at work. Doesn’t do fuck-all for safety.