Your are aware that DA is not an image dump, right? If you didn't make the image yourself you are in violation of the site rules. These rules are made clear when joining the site. They are made clear every time you enter a new deviation. If you are unable to follow these rules, the mods will eventually ban you, or in the very least, take down the violating image or wipe out your gallery. If you fail to understand why, then you are simply ignorant. Trying to justify your ignorance with reasons that do that apply to said rules will not help you. A lot of people have yet to see a lot of images on the internet. It does not give you reason to post any of them if you are not the creator.
I hate to say it, but ~Deathbal101 is right. As soon as something's been made, it's automatically copyrighted to whoever did it. It doesn't matter if it's floating around the internet, it's still copyrighted. Since you didn't make it, you have no right to post it here on dA. This is an art site, which means you post art here.