I'm typing this on 3 hours sleep and fuming - I was expecting a few parcels this week and added on each of them a specific instruction "no knocking please, I work nights, leave behind back gate".
Lo and behold a driver called Mike bangs loudly SIX times between the front window, front door and back gate. I open the door and he sheepishly says "I thought I'd try knocking anyway".
They couldn't spare me ONE incident of being rudely knocked up on my front window because they wouldn't follow a simple instruction.