Parcel tracking has come a long way for sure. The last mile is still the tricky part. Drivers claiming "no one was in" (in some extreme cases putting a card through the door claiming that when they haven't rang the door bell/knocked on door ...which makes no sense), leaving at the doorstep, throwing over fence in the garden, delivering to a neighbour.
Now I get along with neighbours fine and it is not a major issue, but the principal really annoys me. The delivery company is paid to deliver to specific address, not to any address that might be near by. If someone does not get along with their neighbours then the recipient is in an awkward position trying to recover the package.
IMHO the delivery to alternate address (for example neighbour) should only happen if it is explicitly agreed upon. Admittedly on on-line ordering the delivery contract is between the retailer and delivery company rather than the customer of the retailer.