If Draco was called upon, he stood up and very flatly said his name because it's not like she doesn't know his name. He very likely looked at Alecto like, do I really need to say what I think about muggles, but if she pressed him for it, he'd just say that muggles are disgusting creatures and mudbloods are even worse and that one day he hopes they won't be a problem for wizardkind anymore.