This is trolling by people who do not understand the GPLv2, and has happened before. Someone had the "brilliant idea" of "retroactively revoking" the GPLv2 a decade ago (2008): http://www.groklaw.net/article.php?story=2006062204552163

You cannot do it. The only way the right to distribute GPLv2 software gets revoked is for a specific party that distributes a GPLv2 licensed work in violation of the GPLv2 distribution terms.