Not only is grammar correcting just plain rude, it’s soaked in classism, regional chauvinism, and privilege. Total etiquette fail. It gets even douchier when people want to tell me all about how they go ahead and correct other people’s grammar every chance they get. This happened with my new dentist, who, while digging around in my mouth with metal objects, regaled me with stories about how he calls people out–family members, friends, patients, probably also panhandlers with poorly copyedited signs–for using adverbs incorrectly. Adverb usage: apparently one of the Big Problems Today, along with oil rigs asploding in the Gulf and poverty and such. It’s like these people are part of a Douchebag Club A big part of the problem, in my estimation is that we as a society–even the most overeducated among us–have a poor grasp of what grammar actually is and what role it plays in writing. So here it is: grammar is a set of standards that we as a linguistic group have agreed upon to help us understand one another. Those rules tend to be culturally and regionally specific and change over time. No one descended from a mountain with two stone tablets reading, “Though shalt not use a preposition at the end of a sentence.” Adhering to grammar guidelines is about making sure that you are understood. It’s also about self-presentation, but it’s not about adhering to some sort of moral code.