Without being aware of the circumstances one got the clothing it's impossible to say. If say I was a student at a prestigious University and got a bunch of clothing from them, but then for whatever reason I didn't complete my degree there, am I supposed to throw out some perfectly good stuff?
I'm not fond of the idea of "posers" either but like it or not, people have been passing off as things they aren't for centuries this is nothing new...I'm not sure why you're offended by it. The way others spend their money is their own thing, whether they want to use it to "pose" or otherwise.