He seems to be reaching out and really interested in evangelism. Music is music, not an indication of a good or bad priest. I listen to some pretty ugly grunge music sometimes with my son, in order to relate to him and share in his interests. Listening to it does not affect my love of jazz, classical, or sacred music.
I know a hispanic priest who dances at weddings and quinceañeras. When I first heard that, I really had to gulp to keep from criticizing him. After all, Latin music and dancing can be very sexy. But I am sure he dances chastely, and to appropriate songs. And I know for a fact that he has swelled his parish a thousand percent since he became pastor in January. He goes to the people rather than waiting for them to come to him.
Our culture is so overcome by the media that priests these days sometimes have to do unconventional things to get their parishes involved and interested.
I say we should applaud the Punk Priest for reaching out. His parish probably has a huge youth group because of him.