It is a waste of time to attempt to filter tags with no (0) usages because they will never match anything.
I just noticed a couple of new tags have been added, as suggested. This is generally a welcome improvement. However, some tags are unused, but they give the impression that they will actually have an effect when used. Currently Special:Tags lists a lot of these here.
- Remove them entirely from the list; or
- Either gray them out; and / or
- Make them unclickable; or
- Warn users that their tags have no effects after they click on them