I was dealing with the problem with there being two japanese artists called noise the other day. One also goes by Babel, the other goes by just noise, but their websites both call themselves noise. These two are not the same artist. I created two artist wiki pages, but the origonal, noise is still there, and I am unable to delete it.
I labeled the two artists noise(artist) and noise noise(017) after their pixiv login name. Really not a great way to resolve the issue, but I'm unsure what a cleaner way to do it would be.

Not to mention noise by itself is a horrible tag to have listed as an artist. It can be easily mistaken as what an average user would assume, not an artist.