Re: Man up
The DMCA is a rather large piece of regulation. It contains both the takedown notice mechanism (the Online Copyright Infringement Liability Limitation Act, which I guess is what you're referring to) and the WIPO Copyright and Performances and Phonograms Treaties Implemention Act, which makes it illegal (criminal) to circumvent copy-protection measures and such. There is no "DMCA order" involved here; it's just that the attorneys are threatening that what IOActive plans to do would be a criminal act.
That's the way I understand this whole issue.