As you may know, the White House has its own Flickr stream. But take a look at the text bellow the images:
This official White House photograph is being made available only for publication by news organizations and/or for personal use printing by the subject(s) of the photograph. The photograph may not be manipulated in any way and may not be used in commercial or political materials, advertisements, emails, products, promotions that in any way suggests approval or endorsement of the President, the First Family, or the White House.(Emphasis added.) As detailed in an article on Techdirt, these images, as government works, must be (and are explicitly indicated as) public domain, and you can't put restrictions such as these on items in the public domain.
So, in the name of civil disobedience, I bring you: Lolotics.
EDIT: You are welcome to join me in the virtual sit-in; pick any picture out of the White House photo stream, and manipulate away. Post links to your work in the comments. Do take note however that this is in direct violation of the legal terms presented by the White House; any who choose to do so must be aware of the potential for legal action against them, and take full responsibility for any of their own actions