Replica clothing, watches and bags vary immensely in quality. I think if you can tell that quickly, then they're rocking a REALLY cheap fake. That not only says that you're trying to fake the funk, but you're not even doing a good job by being half assed at it. People like that aren't trying to buy a "quality" product, they just want the flash and name recognition. You shouldn't let that anger you by seeing them get away with it - it just shows that you're successful enough to buy the real thing and that you're prescient enough to see through what shouldn't be so obvious.
Lots of fashion in general is just a sliding scale of ripping off the top-end luxury brands: e.g. Zara, H&M, Forever 21. Not saying they are the same as putting "Zegna" or "Saint Laurent" on their clothing, but when they go to the high end fashion shows, take all the new couture trends and then put them in their stores weeks ahead of the original creators... it's in the same ballpark. And these are immensely successful businesses - the guy that owns Zara is worth what, $70B USD?
Lots of fashion in general is just a sliding scale of ripping off the top-end luxury brands: e.g. Zara, H&M, Forever 21. Not saying they are the same as putting "Zegna" or "Saint Laurent" on their clothing, but when they go to the high end fashion shows, take all the new couture trends and then put them in their stores weeks ahead of the original creators... it's in the same ballpark. And these are immensely successful businesses - the guy that owns Zara is worth what, $70B USD?