I don't get the title here ("Apple sends DMCA takedown for IP address"). From my read of the tweet ("I've just received a DMCA takedown notice regarding the GitHub mirror of these documents"), they sent a takedown for the
documentation that someone downloaded and then uploaded to GitHub. The DMCA takedown has nothing to do with an IP address.
And I think it's pretty uncontroversial that downloading some company's stuff and posting it somewhere else (without permission) would constitute copyright infringement. Just because you have access to something, it doesn't mean you have a license to do whatever you please with it.