Hacker attacks music file sharers

According to this report - Hacker attacks music file sharers - a worm disguised as a DVD ripping program is making it's rounds on P2P networks.

Apparently it looks through your harddrives and removes any and all MP3 files.

Am I being majorly cynical, or could this be the work of the RIAA and MPIA in order to punish file sharers?

For why would a hacker, who generally in principle, is for music and DVD copying, write this? Why would a hacker, who hacks and uses tools to get around copyright and reverse engineer do something like this?

I know there are people who are simply writing virus for the fun of it, but this one seems far more nefarious in nature...