But Apple isn't alone. Counterfeiters are building all sorts of fake products. While not all of them will kill you, there's a reason that they're cheap. They aren't certified. Don't use the same materials and won't perform like the originals.
This Amazon Kindle USB adapter looks real. But turn it over ...
That's a counterfeit UL Mark, the symbol for Underwriters Laboratories that tests and verifies the safety of electronics. The real UL symbol is in the corner.
On the bottom of a real Apple USB power adapters, you'll find the phrase, "Designed by Apple in California."