What was the highest violation of stoner etiquette that you have witnessed?

A friend of mine isnt a smoker, but he is always happy to chill. We were hanging out with this guy we'd never met before and were passing the bong around. When it got to my non-smoker buddy and he passed it, the interloper just couldnt fucking deal with that. He began to adamantly demand that our buddy smoke. He politely said no, but the guy kept saying "NO, you have to smoke dude, that's the way it is", to which my buddy calmly kept declining. Even my buddy and I were telling him that it's cool, he doesn't smoke, still, this douchebag wouldn't let it go. He got so heated over it, he started shoving the bong in our friends face. I stood up and yanked the bong out of his hands and straight up told him, "Dude, he is our friend and you're a fucking stranger, remember where you are, and don't be an asshole". I was fucking furious, I was honestly about to fuck this dude up, totally blew my high and the guy awkwardly left a few minutes later to go chill with 'his boys'.

Total fucking douche.

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