Shibboleths are a good thing, I can safely ignore e-mails that say 'You Log-In details is faulty'.
English is one of the less rigorous grammars, languages such as 'Hoch Deutsch' erect higher barriers between the colloquial and the correct.
I was wondering what it is that makes Obama seem so 'Presidential'. We believe that he thinks in those rounded rhetorical phrases, and that it betokens the keen analytical mind of a law professor. In contrast George W Bush used a colloquial Texan designed to indicate native cunning. Outside the USA it just made him seem dim. There are horses for courses and it can pay to adopt a universal idiom to avoid ambiguities.
I'm all for diversity though. Nearly everyone speaks in fractured language, punctuated with particles of speech, just like Obama when he's ambushed with a question without prior notice.
Anyone who doesn't do that is perceived as a con-man.
Damon.