Ha, that's funny. Cabin we rented this summer had a corded "house" phone and watching my little nephew use it was hilarious. He's grown up with iphones and ipads and wasn't used to using something with a cord. He kept walking away with it and almost ripped the cord of the wall.
My vendor has a web portal, so I can block certain calls, we also have a phone tree, 1 for cs, or 9 "if you are a vendor or want to be a vendor," if they leave a message it goes to email. I had my phone company program into one my phone keys that says spam. So if they should press one, I just switch them to spam. We use yealinks 127g