I believe there should be a way to block people that are following you on Spotify. When blocked, the user will automatically unfollow you and will not be able to find you, or view your public playlists.
Blocking should be possible via both username and email address.
Updated on 2021-11-16
Thanks for coming to the Ideas Exchange, and sharing your votes and comments.
We’re pleased to confirm that all users now have the option to block another user on Spotify. With this update, you can actively block another user across desktop and mobile devices, preventing them from being able to see listening activity, public playlists, or view profile pages.
Here’s how it works:
We're always working hard to provide the best possible Spotify experience in a safe environment.
Please see here for more information.