How Rude

My coworker just came and sat down at a computer nearby. She is popping her gum incessantly. Earlier today she was loudly chewing cheetos with her mouth open. I try not to let all the loud slurping and teeth sucking at work bother me, but it's simply more than I can bare. People can behave however they prefer when in the privacy of their own offices, but while we are working in this small space, I would really appreciate if these people would have the decency to eat quietly. Lately, I've been wanting to bring a copy of Emily Post's Etiquette into work. It's pretty big so I figure I can knock people out with it when they start being impolite.