It turns out that Christians have given up on the power of prayer, figuring that Facebook is a lot more responsive than God when you've got a mission. They've taken to social networking in order to get a black metal festival axed.
The Christians - marching unto war under the banner Catholics Taking Action - took against the Sydney Black Mass Festival:
According to their page, "a satanic "Black Mass" celebration is to occur at Newtown RSL – it is simply disgraceful. The advertising which features the insignia of the Church of Satan and an inverted crucifix is encouraging people to come and partake in an "unholy spell to be cast upon the city of Sydney" featuring the "ultimate of soul possessing occult revelations...unbridled blasphemy... [and] a union of all things unholy".Oh, bless them. They actually think that black metal fans believe all the devil stuff. I guess if you thought that, you might find the whole thing a bit alarming.
Anyway, some form protest letters later, and the unbridled blasphemy has been thrown off the venue, and so now won't go ahead. Because, obviously, satanists will just stop inverting crucifixes if they can't get a stage.
[Thanks to Karl T for the link]