TL;DR: Code is art, and if you steal mine again I might eat you.
Before I go into this, I'm just going to say that I will not name names.
So, I recently came across a journal skin that was an obvious rip off of my White Flowers CSS. I asked the poster of the skin to credit me, but they refused, saying only that I "inspired" them, when they had in fact just stolen my code.
I reported the deviation because they hid the comment where I said the code was mine, and blocked me.
deviantART then resolved this report, saying that I "needed more information." I don't see why I should have to work so hard to get something removed when my art has been stolen.
I have also had problems where people modified my skins (simply changing the images) and sold them as their own. These problems were, for the most part, cleared up, but this new issue seems to have trouble being resolved.
Of course, you may say that "Code isn't Art" and I leave you to your opinion. Regardless of that, deviantART claims to think it is. When you install a skin, you agree to this:
1. You confirm that you will have and enjoy a very limited license to use the Skin Content only as set out in this Agreement.
2. You may use the Skin Content only on your user pages or on other pages and applications on deviantART designed to accept Skin Content ("Pages") and not otherwise.
3. You agree that the author responsible for the Skin Content will be credited by deviantART when you use the Skin Content. You agree as a matter of site etiquette not to use the Skin in a fashion that would be clearly objectionable to the author or the intent of the Skin.
4. You may modify the Skin Content as and when you use the Skin Content in accordance with this Agreement, but not otherwise. You may not represent the Skin Content, even as modified, as your own work without crediting the original author.
5. You may not grant permission to any other person to use the Skin Content, even as modified, nor may you export the Skin Content when used under this Agreement in any fashion to any other locations on the World Wide Web unless the Skin Content is served by equipment under the control of deviantART.
Now, I bolded some parts there. You can argue with me until the day you leave dA, but if I find more evidence of code theft, this new skin will probably be the last free one I ever create.