Internet free-for-all?

I agree that you cant use anything you didn't make yourself because you are taking someones work. Just like plagiarism when it comes to writing, if we take someones work then it is not yours and you can be fined for it. The internet is not a free-for-all because there is cases where taking someones work, music, and or images gets them in a lot of trouble and in the end they have to pay the original making.