FedEx drivers routinely lie about folks not being home to accept delivery, but in reality they never even go up to the door to ring the doorbell or knock on the bell. Having evidence that the driver never showed up can help dealing with FedEx to get a package that they repeatedly fail to deliver.

That’s about it though, I don’t actually have a doorbell camera at the moment (I did, but it died, and I haven’t bothered to replace it), and I really resent the mass adoption of surveillance cameras pointed out at public roads and sidewalks, especially Ring cameras which have been repeatedly shown to be readily available to law enforcement.