The only thing you can do is mute. The Nostr protocol doesn’t have a block function. Anyone can follow any user they want.
Discussion
😔😔😔
Thinking about it from a front end perspective. I guess a developer could build in the functionality in a given app… but it would be kind of a lie. You could build a block button. But it would only be in that specific app. Your data would still be visible to that user in another app. 😕😕