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Re:Why is it hard to make friends over 30? (2012) by emodendroket on Wednesday February 21, 2018 @07:19PM (#16434170)
Well, alternatively, we can use our brains and think about questions like "if I am late to this event, will other people be waiting for me/disturbed?" to determine how serious a violation of etiquette it would be to be late.
Re:Why is it hard to make friends over 30? (2012) by groby_b on Thursday February 22, 2018 @07:43PM (#16443103)
Works almost equally well. Etiquette is nothing but a way to codify the answers, a shared agreement on the rules. (I say "almost" because like any set of rules, it makes it harder to get judgment calls wrong.)

I didn't mean to imply it's a magic cure-all, just that it's a pre-shared context that makes it easy to make those decisions.