On my Plex server, I have two users set up.
One is my Plex pass main account, which is pin-code protected, which I use primarily as an admin to create, manage, and share libraries with other local users (well… user (singular) at the moment).
Then I have a second “Media” user, which is only given access to a few polished (well sorted/managed/pruned) media libraries.
On both accounts, I have multiple music playlists which I often find myself wanting to have access to when accessing via the other account.
Soooo, it would be nice if Plex users could share/export/import playlists. 
Additionally, if sharing users could also be optionally be given the ability to grant the permission allowing others to add/remove items, it would give a valuable social/collaborative feature.
This could also tie in to the (relatively new) Facebook login functionality, if in the future a in-Facebook Plex app is created. 
