I will support this for now because it will generate better SEO and twitter responses, according to figures calculated by my fingers on a calculator at random. I also threw dice and chicken bones at a fire1, but I didn't get any results from those.
Additionally, when the site is popular enough that we can do without those tags, a dev can remove them from the database without causing a page-bump on all the old Qs
I would strongly caution against, however, going back and adding them en-masse to all the previously tagged questions. If you wanted you could re-tag them one at a time to add the new tag to the old sets.
Lastly, I would encourage the addition of this tag only when there would normally be four or less tags on a question. This should not supersede a more correct tag on a question (one of the reasons I am against this. That's just tag clutter).
1 that's how voodoo economics works too, right?