I study demonolgy and work with well established Metal bands like Slayer and Anthrax, I also cover some Norwegian Black Metal bands like Satyricon who to the casual observer seem extremely demonic and dark but any of the people or fans I meet are not depressed or in any way disturbed. If anything Metal music is all about empowerment, it's strong music for people who want to feel something powerful and meaningful to them.
The mic stand is shaped like a devils trident
Slayer - one of the biggest bands to ever be targeted as causing depression/murder and everything else under the sun. Again the people involved in the band and the fans I meet never express any sense of depression or negativity, they are just pumped and enjoy the music.
A major gateway for demons is depression and abuse of substances but you don't have to go to shows or enjoy a particular type of music to have access to drugs and alcohol, it's just easier for people to point out a particular group or scene and claim that they are bad news. If anything any of the proper perfectly possessed cases I know of occurring here were brought on from dabbling with the Ouija or other such occult tools. I don't recall any of the people ever even being into Metal, the youngest was a 12 year old boy and he was into pop music and extremely happy, until he found a discarded Ouija and started playing with it.
Other people I know of who experienced extreme demonic infestation and obsession had it brought into their life by associating with the wrong people, basically partners with a very strong history of abuse. It's not hard to invite something negative into your life, you have to willingly accept it into your life. Suffering depression in itself is not enough, the mental illness just weakens your defences to outside influences. While I'll admit that tools like Ouija can be used properly what I've personally seen is the people who do get in trouble are the people who don't know to use protection, don't realize how much of a doorway they are creating and by then it's too late.
Another case I know of was from a girl who was a natural astral traveller, she never tried to bring on the OBE's herself they just always happened. Long story short she got in a relationship with a man who like her also used astral travel but he had used it so much for negative purposes he had effectively invited in and accepted demons as a way to enhance his skills. When she left him he always knew where she was and he could target her easily. Soon demons started infesting her house and it took a lot of work to expel them all.
An even darker case came when another girl got in a relationship with a man and eventually married. She moved in with him and straight away felt like there was something wrong with the house. Yet another long story short - it turned out he had been a victim of abuse and because it was so established throughout his whole family an incredibly evil force had been attracted into his life. I don't recall if he ever did consent to an exorcism but she left him when things got too active and dangerous. These are just cases from Ireland and this is a very small country but most people don't even know we have such cases here. The frightening thing is most of the people who do suffer greatly have normal lives until they meet the wrong person or go dabbling with something they don't understand.
Ramble over
