Well yes, but actually no (at least if you're in the USA). The DMCA prevents the circumvention of copy protection measures, which means that by ripping a blu-ray or DVD, you're committing a crime. This is doubly bullshit in that before the DMCA was passed, copying your physical media was always legal and if you were caught distributing unauthorized copies without being paid for them, you were not a criminal but only potentially vulnerable to a civil suit from the copyright holder(s).