It still cannot be published without your permission and can be removed under DMCA.
Even if you have not registered or "copyright" your content, it can still not be used without your permission. If content, like pictures, articles, art, photos are yours and original they are considered protected and even copyrighted.
DMCA.com can act on your behalf to get that content taken down for you.

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Modified: 12/23/2011
Category: Frequently Asked Question
By: Mr. DMCA Helper
FAQ ID:86d85d9d-3beb-4f61-af56-d888dbce4d79