Unless you specifically need to hear conversations, turn off the microphone. It removes the risk of accidentally recording illegal audio and saves bandwidth.
Before mounting a camera, walk around your property at night and day. Identify where your camera’s lens intersects with another person’s private space. The ethical rule: Use physical baffles, tape, or digital privacy zones (available on many modern cameras) to "black out" areas that cross property lines.
Before you unplug everything in a panic, it helps to understand the specific risks associated with connected cameras.