Instead of following a friend's playlist which you can't edit copy the playlist to your account using this app.
See a couple of playlists you like in your friend's account?
Combine all of them into one large wonderful playlist and transfer it into your account with this app.

Simply have everyone log into their accounts in the app mark the playlists you want and then transfer them to your account.

This is a trial version.
You are allowed to use the app for 24 hours only.
The full version can be found here: https://play.google.com/store/apps/details?id=net.virock.combineplaylists_spotify