That's simply not true. In my high school, for example, Napster got installed on all computers in the computer lab and a full class was dedicated to teaching everyone how to use it. For reference, another full class was dedicated to learning how to use "Search Engines". Frankly, I did not know a single person under the age of 30 who did not have a massive collection of MP3s and divx movies by the time iTunes came out.

Those "People" would actually be called teenagers, and I never met one who didn't know how to use Napster or Kazaa back when I was one of them.