My m4s arrived as well. The courier driver was a little flustered.
He said they were shipped with no signature required. The item description was clearly marked on the packet.
After he put them in the letter box a dodgy looking bloke tried to grab them. Not sure what the courier driver did but he then brought them down the driveway, rang the bell and gave them to me.
So humans suck and courier drivers rule. Why on earth does container door ship $400 headphones with no signature required?
Haven't tried the headphones yet because meetings and it's still doing the firmware update.