But the point is, saying "we don't do that here" doesn't inform the person that their actions are hurtful. It just tells them not to do something, but loses the value of saying why so they don't make the same mistake in a different context. I would argue that saying something to the effect of "It is hurtful when you do X, please don't do that again", is far more effective communication. This would avoid ostracizing the recipient and also clarify what exactly they did wrong.