What an absurdity, this discussion. It's common knowledge that metalheads and even members of prominent bands include professor(s), Nokia executive position, the most famous Finnish meteorologist who is on TV practically every day... etc. A horde of metallers in academic research. My physics teacher at the university wrote in the margín of my exam: "BTW: Support your local Einsatz Kommando". Articles have appeared about this phenomenon in Finnish newspapers. It doesn't have any special meaning in Northern Europe because metal is simply so popular, not marginal or the domain of drunks, imbeciles and unemployed.