I have never been trained, so I don't really know how much merit you want to give my comment, but I would submit that while I agree with your statement, "Brattiness is something that should never be confused with playfulness," Lord Winter, I believe that discerning brattiness may be more difficult online, since it is a subjective word and may depend on the individual's personality. What one person sees as brattiness, another may not. I have to wonder, then, apart from obvious examples, how one would decide through only text, since there are so many other things that are absent in that form of speech: tone, body language, etc...and not knowing the person may impact that judgment as well. Do you agree that brattiness can be subjective, or do you think that it is objective and that, regardless of intent/personality/lack of personal codily cues, brattiness is just as it appears to be?