The final fantasy theme would be included in the category of 'fan art' which ideally would still 'need' permission/consent but in public site common-use would be accepted provided there was a clear indication as to the source of the 'fan' images [that they were indeed such and not original creations].

Fan art that is derived from another's interpretation of 'fan art' , rather than from the source game image would be considered not 'OK'.

Example....

A site has a blue game image in right-hand orientation.

'Fan #1' mods it by making it red and reversing it.

You borrow Fan #1's image and use it instead of the source game image.

Then there's a problem.

It all sounds iffy and tenuous....and in an ideal world absolutely NOTHING not your own would be uploaded anywhere for any reason, no matter what.

In that case, however, it would follow that ALL screenshots were unlawful as they ALL contain portions of graphics or even fonts that are not yours to 'duplicate' or 'distribute'.

And THAT is exactly why there needs to be a reality check with common sense.

Without that nasty 'grey area' there would be no skinning of any form what-so-ever.

No EULA specifically states permission to distribute through screenshot the Iexplore.exe icon, for example [yet it shows up on many screenshots].  No EULA states specifically that you may actually alter and/or create ANY variation of a launch icon to be associated with that program.

Surely each and every alternate shell to Explorer.exe is in violation of some rule and/or regulation somewhere in the bowels of MS copyright as these shells interface with the MS kernel without specific formal consent to do so.

Lots of validation for grey areas when you think about it...