"No, you are. Y'know, Hitler ate sugar."
The problem with people who relate two completely unrelated things (crime rates and church attendance, music and delenquency, sugar and...well...) are either talking out of their ass, following an invisible leader, or both. Music and delenquency are related only by a third factor; age. Coincidentally, church attendance and crime rates are linked the same way, too. Of course, this means that whoever this person was may have been trying to ward you off the "wrong" path, but that's more or less inconsequential.
The biggest problem is that you can't prove these people wrong, and they know it. You can show them all the facts and figures and statistics you want, and it'll never work. The best thing to do is to justify their belief as much as possible; throw the metaphor in their face, argue with them for fifteen minutes, then tell them, "You're just angry because you worked for fifty years and I have limitless potential to waste." At least that's how I handled it in school.
I myself am rather fond of a couple of ICP songs. And Handlebars, though that may not count.
Apologies for auto-losing.