Ban Flag Burning?

There is a movement, again, to ban the burning of the American flag. American Family Association even has an online petition supporting such a movement. While I personally think it would be abhorrant to burn our flag, I also don't like the idea of banning any form of speech or expression. That sounds like I'm a crazy liberal, doesn't it? If I don't want them to ban MY speech--the ability to display religious symbols or speak about biblical topics in a public forum, for instance--then I need to be intellectually consistent. Even lunatics need to be free to express their lunacy, and if that lunacy includes burning the flag then so be it. That's the American way!