Like grab a cup of coffee out of their hand? That's understandable.
deny them coffee in the first place, before they even get a cup
I got a knife pulled on me by a neighbor when I asked him nicely not to smoke that crap in his garden as smoke is going into my house and stinking up my living room. I won't go into details, but he stopped smoking it in garden and didn't pull a knife on me ever again.
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