"Singing with the words in front of you makes you look like an amateur. If you’re happy with that, fine, but expect to be treated like one."

What kind of threat is that supposed to be?
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That and similar comments here are just another form of The Great You Shut Up, the trend in our culture to squelch individual art and expression, especially music-making. "Either let me have the stage or buy something commercial" is your motto.