rotobadger:
I would respectfully ask that you read the relevant section of the United States Code.
USC: 17 § 1201 (a) (1) (A) makes it illegal to "circumvent a technological measure that effectively controls access to a work protected under this title." It is true that there are fair use exceptions to this section, but these exceptions are limited to only those established by the Librarian of Congress. Until and unless the Librarian of Congress promulgates a rule creating an exception, such actions are illegal. This does not, as you state, apply to those who create or distribute tools to facilitate such activities; that is a completely different paragraph. This is a prohibition on individuals' actions to circumvent access controls.
Please understand that I do not approve of the DMCA, which makes it illegal to circumvent access controls in many cases even when the content accessed would otherwise be subject to fair use exceptions. But I am intellectually honest enough to recognize that that is precisely what it does. You may have a right to make a personal backup of an encrypted DVD, but until and unless the Librarian of Congress creates an exception to cover this fair use, it is illegal for you to circumvent the DVD's encryption in order to do so.