When people create a new topic, there is an important hidden option: Self-moderated. They have to choose the option at beginnings because creators can not choose this option later (if not choose at beginning).

There are board like Metan where the option is not allowed so that if you have a self-moderated thread in Beginners & Help at beginnings and move it later to Meta board, the self-moderation rights will be disable automatically.

Moreover, you can not choose this option later even if you move the thread back to Beginners & Help.