We have a few, Each of the kids rooms upstairs ( Both are single digits old ) and the common play area upstairs. The only other one is in the kitchen but wife turned it away because she doesn't like "feeling watched" even after nearly 2 decades.
I don't have an issue with it, but i get when people don't want to feel watched in their own home. I guess. id rather have em but pick the battles.
My daughter is 8. I just took the "nanny cam" out of her room. She complained because now she doesn't feel as safe, which I thought it would go the other way. I liked it being there because I could check on her after she goes to bed without needing to go upstairs or disturbing her, but figured it was time to take it down.
After watching Paranormal Activity I told myself I would never have cameras inside the house. But, then I had my alarm go off and I didn't know if it was a false alarm or an actual intrusion. I knew I was having issues with some of the sensors, but when I checked the cameras the door that had been "breached" was still closed. This is when I decided it was just a movie and I should probably add cameras inside.
My house is a newer build with a pretty open first floor. I have one in the kitchen that covers the living room, kitchen, entry from the garage, and the rear slider. I have another in my office, which is in the front of the house just next to the front door. The basement has two; one that covers the main area and sees an egress window and another than is by the other egress window. The second floor has coverage for the loft at the top of the stairs.
The interior cameras are not meant to ID, but to allow me to see if someone is running around inside of my house, stealing my shit. The system of cameras outside are meant to ID anyone before they break the threshold into my living space.
No one ever complains about cameras when going to the grocery/hardware store, walking down the street, or having your license plate logged by FLOCK all across town. If they are able to protect their stuff and track you, why can't I at least protect my stuff? This is almost the same argument as the President can have people with guns protect him, but it's a radical idea that I am afforded the same protection in my own home.