[50CNT]

Which is why pointing out others breaches of etiquette is also a breach of etiquette.

[feintruled]

Reminds me of something I once read on the difference between good manners and good etiquette. With good etiquette, if your guest starts eating the soup with the wrong spoon, you correct their mistake. With good manners, you use the wrong spoon to match.

[Danieru]

Are you sure that is not backwards? Your parent post would suggest that correcting the mistake is in fact poor etiquette, right?