2. Writing "it's" when it should be "its" is a mistake; people who think the mistake is indicative of the writer's inability to understand the semantic difference between the two demonstrate an impoverished appreciation for the musical quality of language.
3. "You are both equally to blame" is almost certainly wrong in almost all conflict situations pretty much irrespective of the standard used.
4. If it seems the emperor has no clothes, consider that you might need glasses.