I think it's complete bullshit. I also know a couple of girls who are into it, it's just a teenage goth thing, if you're marooned in the suburbs it's a little bit exotic.
The truth is that exotic religions and practises are not to be dabbled in, you can't just "convert" like that (snaps fingers), it's a cultural thing that you are born into. I might think Christians are all arseholes, and I might have read the Koran a few times, but that doesn't mean I can escape the Christian roots of my culture and society. A few chants and rituals won't change that, and won't make me a Muslim, Buddhist, or (god forbid) Wiccan.
fly Saha Air 707s daily from Tehran's downtown Mehrabad to Mashhad, Kish Island and Ahwaz