A few weeks ago a copy of version 4.5 of Sony's PS4 software development kit (SDK) leaked on to the Internet. This shouldn't happen as Sony only distributes the SDK to developers, but it did, and it has put the company on high alert. Public access to the SDK increases the chances of vulnerabilities being identified and therefore a new jailbreak solution being found for the PS4 and PS4 Pro.
According to Ars Techinca, Sony is managing to very effectively scrub the Internet of all traces of the SDK, and it's thanks to copyright law.
Most, if not all download links to the leaked SDK no longer work, but Sony is going beyond just getting the files removed. The company is also targeting any posts discussing the SDK and referencing the now dead links and having those removed, too.
One example of this is GregoryRasputin, owner of PlayStationHax, who wrote a post referring to the SDK and received a complaint from Sony referencing, "The Berne Convention for the Protection of Literary and Artistic Works, the Universal Copyright Convention, as well as bilateral treaties with other countries."
James Woods (@KromeMods) had a tweet linking to a download of the SDK withheld and posted an image of what he received. Not wanting to lose his Twitter account he's decided not to do that again.
Clearly, Sony has learned to jump on any potentially harmful leaks quickly and to throw an entire legal team at the problem. The fact we aren't hearing much about the SDK and those who were sharing it fear for their social accounts, suggests this technique works, and works well.
However, it's very unlikely the leaked SDK will ever be completely scrubbed. Determined individuals will just quietly share and dissect the files in private. We could still see a new jailbreak solution and homebrew development solution appearing because of it.