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My Question or Issue
Can a private collaborative playlists be "vandalized" (edited without permission); can people who follow it, after clicking an embedded "play" button, still edit that playlists, or not? Maybe we can test that question, here.
You can make a public collaborative playlist; you just have to make it public, first. The problem with it being public, is that anyone can comes across it in their searches, by a link sent to them, or on a website. Then, they can edit, after following. Collaborative playlist were designed to share a playlist with who you chose, but what's the point if you can't choose to let everyone else enjoy it?
To solve this, there needs to be an invitation method similar to Google Docs's collaborative documents. After you click "Make Collaborative", there should be a window that pops up that allows you to put in the usernames or, if you choose, the e-mail addresses of the other people that you want to invite to collaborate on the playlist. Then, you can select "can edit" or "can view". The "can view" option would be for anytime that you want to share a collaborative playlist for people to listen to, only. This should share, directly through Spotify to those people, showing a notification, or showing the playlist on the homepage or in "Your Library", under "Collaboration" or "Invitation To Collaborate" (not invite (a verb) to collaborate). Anytime you chose one of the other sharing options, just the bar (like in Google Docs) with the view or edit option should pop up, above that particular application choice. Also, in this window, it should have the option to copy the link, the same as Google Docs does. This way, you can paste it and embed it, for other avenues of sharing.