filtered web sites

Do the owners of web sites that are being blocked by another company's filtering software have a right to know about the blocking? That's a good question, but it's not the heart of the litigation going on to allow a researcher to decrypt a software company's list of web sites filtered. Should a researcher be allowed to decrypt the protections built into filtering software to gauge how the web is being censored? Will the researcher be violating current copyright law if he makes that attempt? Would allowing others to be able to use that decryption tool be a violation of the Digital Millennium Copyright Act? If the Delaware Law Office web site was on that list, I would want to know.