For bitching about language pedantry, other posters' language, and language in general

A few years ago I started a thread on pretty much this exact topic:

To sum up, a researcher found that an education system that ignores the existence of different dialects of English, and just calls out students for supposedly using “incorrect” English (rather than speaking their native dialect correctly), is harmful to students’ education and results in worse outcomes both for understanding English and other subjects (for those students whose native dialect is African American vernacular English).

On the other hand, education systems that recognize the existence of different dialects of English, and specifically teach recognition and understanding of these kinds of dialects can assist these students and improve outcomes both in English and other subjects.

The key is recognizing the existence of these dialects, and deliberately avoiding any sort of shame or criticism for their usage.

EDIT: Looking back at that thread, @wolfpup participated and ISTM that he was much more thoughtful on that issue than in this thread.