I would say it is sort of a feature request. Shunting stuff to a hidden topic (or restricted category) is a recipe for mistakes.
IF
- hidden topics were always at the end of the list
- and, we were super clear in the UI that a hidden topic is hidden
- and, added a confirm … “Are you sure you want to move these topics to a hidden topic?” (or another case “Are you sure you want to move these public posts to a restricted category?”)
I would be open to changing this.