Signage posted at computers available to patrons at the Library of Congress:
NOTICE TO RESEARCHERS
Library of Congress patrons should not use Library computers or systems to access documents that are marked classified (including classified documents publicly available on the WikiLeaks website and other websites). Doing so risks that the material will be placed on Library systems that are not authorized for classified information. Unauthorized disclosure of classified documents (whether in print, on a blog, or on websites) does not alter the documents’ classified status or automatically result in declassification of the documents.
Thank you for your cooperation and for responsibly protecting sensitive government information.