Landscaping.

[Yankyal]

I think letting players edit the game content would allow for exploits...if this could be implemented safely, I don't see why the hell not. Except for the hundred inevitable posts in the tech support board asking how to remove the pictures of Sasha Grey plastered all over the entire map so they could play with themselves while playing, that is.

[ARTgames]

Very pointless, and for what?

Have you never changed the wall paper on your desktop before or have seen other people do it? Same concept.

Its not really important but its just a nice add-on. But it may not be worth the time implementing this idea.

[Aqua]

Pretty much what Art said. You don't seem to grasp that this is local only, and no one else sees what you see. If you want to mod your backgrounds to have Shasha Grey all over your map, that's your thing.
~Aqua