As the title says, compass is an artist tag.
Compasses aren't really the most obscure object out there. People see them, they're going to tag "compass." People want to find an image that they remember featured a compass, they're going to search with the word "compass." I think we really need to have the artist's name set to compass_(artist) to avoid this.
Admittedly, I did not look very hard, but pretty much every instance I saw features the object, not the artist. Just wanted to run this by the forum before messing with it.
Updated by hslugs