Thomas Shey
Legend
You do not teach people on how to behave... wow... that's their parent's job.
You absolutely teach people how to behave around you all the time by your reactions. People don't live in a bubble where they're unaffected by people they interact with; they learn what sort of behavior gets what sort of responses and what they do and want to deal with all the time. If you think otherwise, you really need to reassess human interactions.
People absolutely learn from their GMs what sort of things are unwelcome and will get negative responses. And not all the signals about that are direct and overt.