I have a Superdry trench coat, I love it, it's a brilliant coat.
Do I care that it seems to be warn allot by Rah's? No, because I like it.
Does wearing it mean I am somehow part of their subculture? No.
Have I found a coat of equal quality for the same price from a brand that is less well known? No.
If you find an item of clothing, hell anything you like, don't ignore it simply because it's popular either in general or with a certain subculture, all that matters is if YOU like it. If anything it's the people who try SO hard to be "different" by passing by great brands that I think are more superficial than the 3 people wearing the same coats because they are just good coats.