Especially if it's because they've got a cold - the accompanying CHOFF CHOFF noises are reminiscent of a beaver trying to chew bubble gum without letting it stick to it's teeth!
Sucklers and slurpers should also face the wall when eating, so that the genteel amongst us can nibble our finely shredded salads (no dressings, obviously) without gagging intermittently at the sight of mushy croutons being sprayed across the table.
And if you're going to give your darling children a jam doughnut at least cut it into small pieces and make them eat it with a fork or a cocktail stick or something and suck the jam out first or else... face the bloody wall!!