Being very familiar with the RIAA's penchant for "misspeaking", even when under oath, I investigated the matter a bit, and learned that a large number of suits have been brought by the RIAA quite recently, one as recently as this Monday.
Turning ISPs into the content police won't work either. To repeat: the business model is broken. Unless and until the music industry figures out other ways to monetize, all of these efforts must fail.
To borrow from Pete Seeger, when will they ever learn.