Why should that matter?

The people with authority to do something will, should it be required, and those without can't. Advertising this doesn't change that.

When it comes to actually making posts, then it should be judged by the content of the post, and not any "status" attached to the person making it.

Having a visual indication about the user rank is useful. But yes, the status doesn't mean the person is right.

The subject here is about wasting less space and show either a label or use a dedicated color based on the user's rank.

Wastes even less space to remove a redundant facet.

That's why I think the best solution is not to use badges but rather change the user text color with additional information on mouse hover.