...I can understand if he just didn't want other 
people taking credit for the desktops he'd 
created (and I do say created, because it did 
require use of the creative process. It's nearly 
inmpossible to create an anime wallpaper that 
isn't "derivitave" of the original anime since 
you are using images from it, and no one claims 
they drew/made those images; however, what each 
person does with that image I do credit to them), 
however, that's a BIT much. I edit wallpapers 
from people's sites to use on my computer all the 
time, since my icons are on the left side and 
people who create anime wallpapers have this 
fixation for putting the images on the left 
side...would he bust me for that? Really, I think 
it all comes down to what people claim they own; 
however, you are right, there are a lot of grey 
areas.

-Misha