I am seeing an increasing number of accounts that merely share photographs obtained from the web. Much like one does with great shots on Facebook. And Deviant Art's response? Install a labyrinth that has to be navigated to report the account. And it would appear that even then they are not interested.
In the "Permission Issues" spiel dA say "DeviantArt protects the rights of artists and maintains the following Copyright Policy." In that policy it clearly states a copyright infringment includes "Placing someone else's photograph or creative work online without proper permission."
Sure they'll maintain Copyright - so long as it doesn't require them to do anything. And it would appear even receiving copyright infringement notices is now too difficult for dA.