RIAA and MPAA refused by the Supreme Court.

Both music Majors' lobbies went to the highest Court of the United States , and were refused.
They wanted to get the right to force ISPs to provide them personal informations from their customers downloading illegal files. Therefore, they'll eventually be obliged to lodge against X [Trans: not very sure of the translation... Basically, the idea is to lodge for a damage from somebody you don't know. Not that useful in most of the cases.]. Of course, such individual prosecutions are much more expensive, and their virtue is to prevent excesses.