Copyright Law is Unenforceable Online

I don't want this to be a discussion of business models and how they need to evolve. I don't want this to be a discussion on whether or not online piracy is moral.

I want us to all just take in the fact that copyright law is completely unenforceable online. Copyright holders are given the shield of DMCA, which is a truly worthless shield indeed. Try DMCAing the pirate bay or any other torrent site and see how far you get. DMCA offers no real protection where it is needed the most, and is completely ineffective 95% of the time.

So, the question is: will copyright law ever be enforceable online? If your answer is yes, how do you envision copyright holders protecting their content? If your answer is no, what do you think the consequences will be, for content producers and consumers?