He was looking at his phone because that's what the third party amazon delivery companies use for delivery confirmation (Scan item and GPS snapshot of phone). He's an older guy and you have a pretty long/up hill climb to get to your front door. I'd give this one a pass - that is prob. the most gentle drop that package experienced during it's entire trip. I've seen the inside of an amazon warehouse once last year during a technology event - even during this private event with outsiders in the building the employees were stuffing boxes and tossing them all over the place. Then those speedy conveyer belts sip those things all over the place before they go to loading which they get tossed around again.
Don't get me wrong when drivers chuck LED monitors over a 6' privacy fence there is an issue. But when grandpa tosses your amazon prime package that he got paid $2.50 to deliver over your railing - I don't see an issue with it.
We get Prime packages 3 - 4 times a week. Some get tossed to the porch, some get left in front of the garage, some get left 5' from the front door. If it's not broken, I'm not worried because it was free shipping and I got it same day or next day!