Just because you don't like a certain Significant other of someone in a band doesn't mean you are any less of a fan of their music. It just means for some reason or other you don't like them.
bad cuzin the girls are epically nice ive met the band once and their dedicated to their girls so wishing harm is a no go its just wrong and theyd be quite piisssed if a "fan" threatened to hurt their girl to them its like saying dump her or im not ur fan they dont care if u drop them cuz of who they datin or married too cuz to them it means ur not a real fan
Obsession stops being healthy when you threaten someones loved ones. Even if it's just messing around in my opinion just because you never know who's going to take it seriously.
I'm obsessed with hockey. I would never be okay with saying "I'm going to kill so-and-so's wife/girlfriend so I can marry them!" because that's really, really wrong. How on earth did she get the idea that it was okay to say that? It's so horrible.
I say I'm obsessed with Black Veil Brides because I've been a fan for so long, absolutely adore every single one of them, and know quite a bit about them. But I'd never go as far as to say as I'd harm someone around them. That's a little TOO far, you know?
I always say I'm obsessed with Avenged Sevenfold, simply because I know a ton of facts about them, and I would completely freak out if I go to a concert and/or meet them, aha. I think your cousin is a little over the line. Anything is okay, as long as you don't start to want to harm people just because they are close to a celebrity or person you know. :)