LOL, I just read that on Yahoo too.
I don't grunt, at least I don't think I do, but maybe likek you said, at the end of the set or final 1 or 2 reps maybe a little, but not loud like the dude who got kicked out of the club.
What's next, if you sweat too much, they won't let you work out. I mean, come on, it's the way he works out, like some people snore, some do not. Who cares, go about your workout, turn your MP3 player up a notch.
They've done studies you know.... 60% of the time, it works every time