I agree with most of this article – to a point.
I think it’s damn important to at least listen to what your crowd is requesting, as it can give a good indication of what they want to hear throughout the night. Obviously you’re going to get some crazy/stupid requests (I had a girl request the song I was playing at the time at my last gig 😛 ) but you learn to sort out the good ones from the bad.
While I’d never play something I’ve never heard before, I would never be one of those d***s who tell requesters where to shove it. They’re not there for you, you’re there for them. At least listen to what’s being requested and if it fits the night, try to have something similiar next week!