The impolite act violates the basic rules of etiquette.

这种不礼貌的行为违反了基本的礼仪规则。

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You conduct contravenes the rules of etiquette!

你的行为不合道德规范。

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In the ancient time, there were many rules of etiquette.

那么在古代的时候，礼节非常多。

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When the sharing happens face-to-face, sometimes it helps spell out the rules of etiquette.

WSJ: Tech's Over-Sharing Economy

Similarly, the most potent antidote to the rapid erosion of personal privacy may prove to be not new laws but new rules of etiquette.

ECONOMIST: Through a glass darkly

Before making the switch, PricewaterhouseCoopers encouraged its employees to follow some basic rules of etiquette, reminding them, for instance, not to leave uneaten food in someone else's office and urging them to replace office supplies they used.

WSJ: Warming Up to the Officeless Office