Everyone who knows how this software works thinks that you do not want to do that.
A site about cars is literally the go-to example how to use tags: https://community.cartalk.com/ (It's Time We Talked About Tags)
Yes, you could add them all to SiteSetting.default categories muted. And then you’d somehow make it so that people could find them and un-mute them at /my/preferences/categories.