Oh, these aren't the offspring of dragons and humans, if that's what you mean. They're like the lizard people in this setting, only replace the word "lizard" with "dragon." How are they any more silly than "lizardfolk"? It's just not making any sense. 

Or, just consider them lizard people with horns and a weak acid breath. That's really all they are. There's no good reason to exclude something like them. None.