AS long as the person is goth because they want and not because their friends think it's cool, it would be ok. I'm just afraid of these goths when they decide to cut themselves or go more morbid like in the film "My First Mister" (I think that's the way it's called, one with Leelee Sobieski)
But honestly, I was a teen, I had my naughty moments, by typical tamtrums, whatever, and I never needed to label myself in any groups, I was just MYSELF. And still think it's the best way to be instead of hiding behind group identities! So I understand why candygirl says she wouldn't like her kids to be goth...
Anyway candygirl you might not like in the future if they do that, but don't say you wouldn't "let them", because as more as you try to stop them, more they will want to do it. And you can refuse to pay their black clothes and make up but you won't change their thoughts and tastes, so better to try and live in harmony don't you think? and accept the way they are as long as, like I already said, they don't go too mad over it !