Because I personally want to kill the concept of copyright.
Hear me out, I'm articulating probably a more radical position than I probably personally believe. I don't want to upset the status quo by fiat. I don't want to just destroy the AAs in a flash of legislative or judicial action.
But the question of who owns art is getting pressurized. Why should any particular company be profiting off of the Beatles music now? That is _our_ music, _our_ culture. An artist does not create in a vacuum.
For a brief while in my life I was able to access just about any piece of work--music, TV, movies--in my culture. It changed how I viewed intellectual property (along with the usual litany of Lessig et al literature).
Right now our culture is trapped. It is owned by companies that taint our viewing experience with commercialism, piggy-backing their own signal on _our_ discussion. Marketing means war for your mind, which comes out a lot more paranoid than I mean it, but I hope you'll see the point. I don't want to have to think about which car is sexiest for my socio-economic position while catching up on [Show].
More to the point I don't want to leave a really emotional, poignant moment in a TV show directly into noise about which razor I should buy. It's like having a loud friend at the movie theater--except that you can choose your friends, you can only fast forward through commercials.
And this only happens because of copyright, because some men in suits have the right to determine what we see.
Copyright isn't about protecting intellectual property, it's about maintaining control.
Now I've attacked advertisements, which means someone will point out that advertising funds mosts of our TV shows and movies. As far as I can tell, it just doesn't have to be that way. We'll be able to set up our own TV studios soon at minimal cost, and then we won't need anything more than our own talent.
So you see, the people who are against domain seizures may partially be angry at the rights violation, the government regulation. But they're probably also for the open internet--an open internet where copyright becomes less and less important.
In our lifetimes, we will see the end of copyright. It will come naturally and effortlessly; it will not be a bloody revolution.