>> Where is the moral vagueness in the accusation?
The legal definition is wide enough to encompass a broad range of acts that people have differing moral intuitions about (even if they are all bad acts, some are markedly more heinous in a lot of people's minds). That leads to moral vagueness. Pointing to a legal definition doesn't change that.
If I went around calling you a killer, because you kill insects, or a criminal, because you had an alcoholic drink when underage, or a producer of child pornography, because you sexted your girlfriend a photo of yourself when you were 17, and then pointed to a dictionary or legal definition to show that I was technically correct, would you not still object that I'm using terms that are overly vague as to the morality of what you have done?
The legal definition is wide enough to encompass a broad range of acts that people have differing moral intuitions about (even if they are all bad acts, some are markedly more heinous in a lot of people's minds). That leads to moral vagueness. Pointing to a legal definition doesn't change that.
If I went around calling you a killer, because you kill insects, or a criminal, because you had an alcoholic drink when underage, or a producer of child pornography, because you sexted your girlfriend a photo of yourself when you were 17, and then pointed to a dictionary or legal definition to show that I was technically correct, would you not still object that I'm using terms that are overly vague as to the morality of what you have done?