Adults spit everywhere as they like and cough openly under any circumstances are really intolerable. I do not think that they ever consider they do something very disgusting. Nobody told them about that, or even worse, they do them deliberately to show their rebel spirit? Anyway, I feel desperate for their kids since these children must not be educated to behave well in public places. I do not know whether our schools nowadays start to teach children these things, at least I was not taught how to behave in public places at primary school, I learnt etiquette from my family. Who dare to tell them not to spit or cough openly in front of their faces?