Let's talk table manners...

I'm one of those people who can't stand to hear people chew. There is one person, with whom circumstance regrettably dictates I interact with regularly, who chews insanely loudly. If I were to try and liken it to something then I think the closest I could get would be a toothless hippo lazily performing fellatio. The point here being; can these people actually not hear themselves? Are they not aware that while they're just savouring their werther's original everyone in a 10 mile radius can hear their saliva frothing around like a tsunami of aggravation? If they can't then I think society owes it to these people to tell them before they get banned from all picnic areas and fancy restaurants!