Depends on the Hessian. Many do and at least as many don't. The consensus says that it is a personal choice, and its placement in ideology revolves around the freedom to engage in drug usage. Metal tradition involves a fair amount of intoxication. The concert, a gathering place for Hessians to indulge in the music of their culture, often involves ceremonial mixing of alcohol and marijuana intoxication before and during the concert in order to further escape the bounds of social thinking.
Adrenaline amplifies the experience.
And as is appropriate, finding a better way to enjoy your time than THE MAN's options is paramount, and if it means smoking a lot of dope at school, it will surprise no one. More important are the personal decisions. As becomes obvious, metal in its distinctive individualistic ideal exists composed of individuals who make different choices.