Screenshots and 'partial obscuring'
This is an old example .... but indicates what can happen when only the 'blank' bits of a wallpaper image are obscured...and not the 'subject' image itself.
It's a copyright image issue - all about redistribution - and how to reasonably protect the artists' rights.

As you can see from the 'inset' image overlay ....Garfield's wall was a simple 'extraction'.
Of couse it can get 'problematic' if/when two separate screenshots are uploaded using the same wall ... but with different 'parts' obscured. [This happened at least once ...and enabled a copy/paste to restore the entire image].
Wincustomize.com is possibly the only site to moderate thus and so assist in wallpaper artists' protection .... something we try to achieve to benefit all ....
The simple solution is to obscure parts which would be reasonably difficult to 'recover' ....in this case 'the cat'.
Obviously this is not an issue were one to be uploading one's own wall art ...
