Random person music library in iTunes I mainly use the USB connection between my MBA and iPhone 5s just to do backups. There is no music on my iPhone. Today, when I have connected my iPhone I have noticed a random music library from the person I have never met. 


macOS Sierra 10.12.4
iOS 10.13.2


I can confirm that my iPhone has never been associated with another AppleID as I have bought it brand new.



Any ideas on what might be happening?
It just means someone on the same local network as you is sharing their own library.

As it has a padlock, it means a password would be needed to listen to it.



If it wasn't password protected, you'd see a note symbol instead.



The chances of seeing 'stray' shared libraries are of course greater if you're on public wifi - you need only worry if you were connected to a supposedly private network &amp; you don't recognise the name.