I'd like to create a safe space without distraction and a focus on specific topics.

But as soon as a user from my instance posts or reacts to something outside of my instance, a lot of data gets transferred and everyone from my instance will see the post in the "All" timeline.

This could lead to a lot of distraction pretty fast, especially people with ADHD could lose track if they see some interesting stuff from other instances. I want to avoid this and give them a safe space to be able to focus.

The only way I figured out was to deactivate federation at all. There is only one button in the settings.

But I would like to keep the feature that people could comment from other Fediverse tools like Mastodon, Kbin, Peertube, etc., but it doesn't work anymore, if federation is deactivated.

Is there a way to keep away all federated content from other instances, which got in touch with my users (proactively cross-posted stuff is okay), but keep the feature so people from other instances could post something?

And it would be okay if my users comment on external posts, too, but not all people on my instance have to know it or get distracted by it.

Thank you for your help :)