It's hard to tell when the whole voyeur house craze started.
Some might trace it back to a site called Voyeur Dorm, where a group of college aged girls shared a large house which was outfitted with web cameras in various rooms. Then came the advent of reality TV and shows such as Big Brother, which allowed us to spy on people who were competing for cash and prizes.
After that comes the real exciting part – hacking the cameras.
If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware.
If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices.
Again, while not staged, it also wasn't completely candid.
An interesting twist on the genre appeared a few years ago when a brothel in Prague installed spy cams throughout it's facilities. Customers could sleep with the escorts for free if they agreed to have it recorded and streamed live on the internet.