You may think it is over the top, but I would have removed the link in the OP - I can click that link, download the screenshot and extract the wallpaper in a couple of minutes. I really don't see here any protection for that artist's copyright.
End of quote
Fuzzy....that link is to the artist's upload....and he controls its access and distribution.
If he doesn't want it linked to he can delete it at its source.
That is entirely different to someone re-uploading his image elsewhere...be it in an unobscured screenshot...or as a wall download.
Hot-linking to a legitimate upload isn't an issue.
Allowing distribution to IP without the owner's consent is.
It's really quite simple.
To anyone claiming to have a fully exposed wall not of their creation....let me know...and I will remove it [or them] to maintain appropriate IP/copyright.