People who know the brand can usually tell right away when its fake. Personally I'd buy something that is just as cute and fashionable but less money and not a well known brand instead of something that's fake. It defeats the purpose of buying that brand if you buy it cheap and fake.
I don't care about wearing 'brands' in general, let alone fake or well-faked ones.
If I don't like something, I won't buy it, brand name or not. Likewise, if I DO like something, I also don't care if it's brand name or not. Though generally I will look for a less expensive alternative of similar quality if there is one available.
I prefer not to buy brands, real or fake. I'm not really interested in being a walking billboard, nor do I want to try to impress people by wearing brand names. I can't really think of any other reason why I would buy them.