That seems to deal with anti-circumvention provisions and not copyright provision and not with infringing on trademark/copyright as the GGGGP (white-flame) seems to be pointing to.
Chamberlain is cited as a rebuttal to the DMCA argument; the DMCA has nothing to do with trademarks, and therefore I took it's citation to be in reference to it's anti-circumvention clauses. For the trademark argument, see Sega v. Accolade's decision.
