I wouldn't say it is not allowed, just that it is distracting and takes away from the article. I didn't find it relevant or poignant enough to overcome the initial shock. I skimmed the article afterward but the only thing I took away from it was how jarring the intro was. I'm not just being prude, in a different context the lyrics wouldn't bother me.
Of course, I'm not the arbiter of social conventions but many times you ignore them at your own peril.
As an aside, if you are well known for breaking certain social conventions or are influential enough you can usually get away with it without much criticism. Nobody is going to scold Steve Jobs because he wears a black turtleneck to a board meeting instead of a suit.
The quote is directly relevant to the piece. It fits completely within the context of the article (personality vs. success).
I don't think something should be disallowed, just because it falls out of your narrow sphere of what's directly permissible.