[cameronh90]

An Amazon driver left a parcel for me and didn't ring the bell, then a few minutes later someone stole it. I ran outside, chased them down and took it back.

The police took the report, but obviously they weren't interested in coming out to take the details of the thief or help me recover the package.

The doorbells also notify you of packages that have been left outside and let you answer the door remotely, which are both useful even if you can't go Blade Runner.