@HistoPol On platforms like Hubzilla and Streams (and most other platforms that support threaded conversations), you have more control.

Basically, a threaded conversation is a container, and the person who started the conversation controls what goes into that container. If you, as the person who started the conversation, don't like what someone said, you can delete their post. Since it is part of your container, a delete notification goes out to everyone participating on your thread and the post gets deleted for them too. The person who originally posted it would still have their copy, and their followers might still see it, but it would no longer be distributed via your thread to people following the thread. You can also prevent someone from commenting on your post at all, which in that case, their comment gets rejected and is not distributed to anyone.

It works similar with forum topics, except the forum owns the initial conversation. The administrator or moderator can delete posts and restrict commenting.

The threaded conversation model gives you more control over the conversation than non-threaded platforms based on pre-X Twitter.