Not all security systems are created equal. The level of privacy depends largely on where the data is stored.

If you want to sleep well at night—ethically and legally—follow this checklist:

We are in need of a new social contract for the age of the porch camera. The old one—"my property line, my rules"—no longer fits. When a camera on my house records audio of your private conversation on your porch, whose right prevails? When a doorbell's facial recognition tags you as a "frequent visitor" to a house where you are having an affair, is that a security feature or a surveillance nightmare?

Some municipalities are trying to regulate. In the UK, the Information Commissioner’s Office has ruled that domestic cameras pointing beyond the owner’s property line may violate GDPR if they record neighbors without consent. In the US, cities like Santa Monica have restricted police use of private camera feeds. But most places are legal wildlands.

The only real solutions are architectural and behavioral. Point cameras only at your own property—not the street, not the sidewalk, not the neighbor’s window. Disable audio recording, which is almost never needed for security and almost always a privacy violation. Use local storage (microSD cards or local hubs) rather than cloud subscriptions. And perhaps most radically, ask yourself: Do I need a camera, or do I need a community?