When having a meal what behavior most allergy letting a person? 100 thousand netizen spits groove

Have a meal on table as a child, parents taught us a lot of formal. For instance: Have a meal not to break up to break up with the chopstick, do not knock Wan, not spurt mouth is waited a moment. But always have in the life some have a meal not cultured person. The netizen looks how to say below:

Say on table you feel disgusted most what behavior?

The welcome comments on attention!