Currently the fuss over the Terms of Service is Clause 16 and the only reason that this clause is causing a problem is because the people concerned with it stop reading there or read it in isolation without looking at all parts of the Terms.
But first things first- here's clause 16;
16. Copyright in Your Content
deviantART does not claim ownership rights in Your Content. For the sole purpose of enabling us to make your Content available through the Service, you grant to deviantART a non-exclusive, royalty-free license to reproduce, distribute, re-format, store, prepare derivative works based on, and publicly display and perform Your Content. Please note that when you upload Content, you allow third parties to copy, distribute and display your Content.
Now the concern is over that last bolded line. That line is there to make certain that people are aware that others may download, view, d