That wouldn't be for the first time, Puncher :)
I don't mind folk buying designer shirts etc. if that's what floats their boat, after all it's their money, they can even set fire to it if they want and I won't intervene (I might suggest giving it to charity would be better but - hey ho whatever).
It's when they never just refer to it as a shirt but rather a X&X shirt or whoever - it always smacks to me of trying too hard! The people who "wear it well" are the ones who don't see it as a topic of conversation and don't feel the need to talk about it.