By using tools like kbin you are also free to assamble the fediverse you want without the need to follow a single instance only.

Is there an app version of that?

Why can’t a user choose to block an instance? That sounds like it should be a feature request, at least for the app.

Agreed that blocking is a security precaution… but this is not just an anti-spam feature, defederation in user communities can come from any motives, including political, religious, or whatever other views the instance owners find undesirable.

I think each user should be able to pick what kind of blocking experience they wish for themselves. There should be as a bare minimum a way to set either an instance, or a client app, that can interact with instances that are defederated among themselves (without acting as a bridge, obviously).

a small exodus from Tildes

I’ve seen Tildes being proposed as a Reddit alternative along Lemmy, what was the exodus about?