I agree with you about the risks down the line, but I wouldn't lose any sleep over it myself.
Many people would love but cannot afford a real one (of whatever it may be we happen to be discussing), so a replica/copy/fake (call it what you will) may be all that they can achieve. I'm not going to discourage them. We might just as well get used to the fact that these things exist. As mentioned before they're generally pretty easy to spot if you do even a modicum of homework before you buy.