There are several folks out there whom claim to be “Gothic”, but what does that truly imply? Are their truly any guidelines that a accurate “Goth” lives by? I assume not. In my humble opinion, the only issue that pertains to any supreme Goth of pure truth is “creativity” and “originality”. These two words might sound alike, but truly they are not.
People today are attracted to the Goth subculture for all sorts of motives. Some are there mainly because of their dark and brooding personalities, some mainly because they truly like the music, some mainly because they like the garments. I suspect that all of the above figure to some extent or other in most Goths. In order to show that one particular purpose is somehow a lot more genuine than the other individuals, or that some Goths are a lot more actually gothic than other individuals, you will have to import your criterion of choice from outdoors the gothic subculture.
For to the extent that there is an immanent criterion of becoming a Goth, it is a pretty versatile criterion, one particular that will not impact the radical purge of the gothic subculture of which you appear oddly desirous. And I really should assume that the homogenization of the gothic subculture that would outcome from the application of such an authenticity test would be the death of the subculture, a death that is in no intriguing way gothic.
I assume it is pretty accurate that Gothic like is a label usually applied from the outdoors rather than from inside. Element of it is mainly because the Goth subculture tends towards valuing individuality (in spite of the outward look the black dress code occasionally conveys) and so tends to attract folks who have a tendency to reject labels as also simplistic.