I know that an user can add a song to collaborative playlist. We do that, with my friends. I told about an user who added many (about 40) his own songs to a collaborative playlist (and I've understood that this behavior is an habit because I found other users on other socials complaining about that)
Keep in mind that when a collaborative playlist is public on any profile, any user can edit it. For now, we'd recommend creating a new secret collaborative playlist and moving all the tracks to it in order to get rid of this unwanted user. The easiest way to do this is using the desktop app.
However, other users think it would be a good idea to have only selected authors for collaborative playlists in order to avoid this. If you agree, we'd recommend adding your +VOTE to this thread. You can also subscribe to it in the three-dot menu and that way you can stay up-to-date with any relevant news about this.
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Any chance this is about that "MORISDOWN" dude? Not only is his music terrible, but he's ruined every collab playlist I've had / been part of. I don't even bother with collab playlists now because somehow he always finds a way to put all of his awful music on them
I’ve had this problem with a user adding the Morisdown tracks. What’s worse, this user deleted all of our songs from our playlist. A hundred plus songs from a group of friends, deleted by some **bleep** spamming us with terrible music.