There are various regulations and laws that govern the use of home security camera systems, including:

Home security camera systems are not inherently good or evil. They are tools. A hammer can build a house or break a window. Similarly, a camera can catch a porch pirate or harass a neighbor.

Municipalities are waking up. For example, some cities have banned the use of facial recognition on residential cameras. Others require signage if a camera records beyond the property line. The trend is moving toward limiting data retention—forcing users to delete footage after 30 days.