Anonymous is calling for the US to disclose all top secret information to the people, the people have the right to knowledge, and they have the right to know what their government is doing, and what it has done. If they have something to hide then it's obvious that they are doing something wrong.
"The very word "secrecy" is repugnant in a free and open society"
John F. Kennedy
their excuse will probably be that keeping things secret is a matter of national security. That is not true, they fear that if the people learn what they are up to, then there would be rebellion, well maybe that's what we need because, if it takes rebellion to change this country for the better, then so be it.
Knowledge is power.