Insults are the last defence of desperation generally used by those who have lost the argument anyway!
The latest trend for lobbing insult hand grenades seems to be English grammar both in usage and spelling; my spelling is perhaps not the best in the world and my punctuation leaves a lot to be desired. I do try to use spell-checkers whenever possible although my excuse is William Shakespeare didn’t punctuate and look how famous he is?
As far as I’m concerned all these grammar zealots lost the right to complain a while ago when JK Rowling’s word “muggle” made it into the Oxford English Dictionary!
On a final note I stand by the dictum; “What a person says is more important than how they say it“