John McIntyre comments on an article by Jill Rosen in the Sun -- the paper where he's the copy-desk chief -- "about the grammar vigilantes who make it their business to correct other people’s lapses in grammar, spelling and usage."
Some people Ms. Rosen quotes complain that this nagging about grammar has intimidated them, has inhibited their readiness to write. That’s not necessarily a bad thing. You may recall Flannery O’Connor’s remark, “Everywhere I go I’m asked if I think the universities stifle writers. My opinion is that they don’t stifle enough of them.” The Internet contains a tsunami of half-baked ideas, ineptly expressed.
However, he also thinks it's just rude to go around correcting people:
If bad grammar is a breach of etiquette, then what is publicly scolding people about faulty grammar? It’s bumptious. It is like going around and correcting other people’s pronunciations — not an activity that will leave you beloved.
Bumptious is an awesome word, by the way.