The DMCA is a set of laws. The DMCA takedown procedure is a part of those laws, defined in a fairly rigid way: it has specific notification requirements, timeframes, and is clearly defined to only apply to copyright infringement. Just because the DMCA also prohibits circumvention, it doesn't automatically follow that circumvention is the same as copyright infringement. And the Wikipedia section that you linked to doesn't mention the takedown process at all.