Gothic clothing and accessories are pretentious and showy. It is nothing but an attention grabbing deviation from the norm, designed purely to turn heads, and if you as a designer disagree then are simply full of yourself.
The style of dress is both unconventional and overly-extravagant, doing nothing but clashing with the norm in an attempt to "be different" and as such stand out. It is not clothing, it is a costume. Any that would even consider dressing in such a way in a public scenario that doesn't merit a costume is acting as a child.
Yes, I will judge the people as a whole based on how they dress, because the style of clothing reflects a desire, however latent, to "be different".