This is because if you make the slightest deviation from 'correct grammar' in a piece about grammar, you'll be attacked mercilessly. Every word, every m-dash, r

This is because if you make the slightest deviation from 'correct grammar' in a piece about grammar, you'll be attacked mercilessly. Every word, every m-dash, requires an unshakable argument for its correctness in that context. Pity really, but as long as it's cheap and easy to attack anything with a whiff of hypocrisy...