Really good to know. I usually just leave the table making excuses at the time.
Of course in some cases I get annoyed by the sound but in other cases people just dont have manners and they eat like savages.

I also usually read on the train on my way to work and if I'm reading and someone is chewing gum its time to leave my book even if it is interesting and take my headphones and play music as loud as I can while hating the person next to me.

But it is important to stop eating like savages and have some decency.