Now that tech is smaller and cheaper than ever, it's become easy to install cameras almost anywhere. In fact, once you start looking, you may realize that cameras are everywhere: on traffic signals, ...

Forbes contributors publish independent expert analyses and insights. Prakhar Khanna covers lifestyle tech for Forbes. The Oppo Find X8 Pro is one of the slimmest camera-centric phones on the market.

And, Airbnb has had ongoing problems with renters finding hidden cameras planted by hosts in places where guests should expect privacy. (The Airbnb regulations do allow hosts to place cameras in ...