Study: Doorbell cameras take toll on delivery workers

What they're saying: "While doorbell cameras are heavily marketed and described as tools for safety and security in the home, they are also near-constant tools of workplace surveillance for delivery workers," researchers Aiha Nguyen and Eve Zelickson write in the report.

• Camera owners often use what the researchers call "boss behavior," using what they record to "monitor, instruct, and punish delivery workers."

Between the lines: Compounding the issue is the fact that many of those making deliveries are gig workers, who already lack significant benefits and job security.

The big picture: This is just the latest warning over how images from doorbell cameras are being used.

• Much of the previous focus has been on police use of private surveillance-camera footage, which privacy experts say is typically subject to few legal limitations and can easily be misused.