Most people who aren't in the scene, or don't have friends that are.. will get most of their info from idiots of the infortainment industry ((aka, the news channels)). The infotainment industry cares more about shock and ratings, so any type of subculture you see on television is usually portrayed in an extreme light. Like suicides, murders, school shootings, etc... bullshit. And that's why I believe people have this natural and uneducated way of associating black or dark clothing with depression, evil, morbidness, etc....

And yes, I've known a few people who are not the per se "goth" and were horribly depressed. most of the people at the clubs I'm at are usually happy people. Why? because most are unchained from society's shackles of "fitting in" and can truly express themselves as they see fit.