I'm all for the right to freedom of expression, but I don't think there is, or should be, a right to a forum to express it.

I know in my country, everyone is free to assemble. You can stand on the sidewalk and tell people what you think as they walk by, and they can tell you to fuck off. There's public access TV. You can go the library, log on a computer for free, and start a free blog. But just because you can't afford to put your own message up on a billboard, doesn't mean you should ruin someone elses, and it certainly doesn't mean someone owes you one.