I agree, though it's hypocritical
I can't stand it when people do it. Though it's a struggle for me to shut my mouth in the best of times, eating is nigh-on impossible to do with my gob shut, but I bloody try. One person asked me politely to shut my mouth, but were VERY understanding when I said I couldn't.

But I see people who walk around with their mouth shut all day, but then visually inform me what they're having RIGHT NOW and what stage of mastication they've reached. Not. Right.
( Methylene Blue - electrohead, Sat 3 May 2008, 0:06, Reply)