Anyone who is an expert in their field can have a real superiority complex over those less informed. A copyeditor tends to enjoy catching published errors and grammar gaffes — especially when a writer feels their work is ready for publication without the benefit of an editor’s eyes. This article is from a “recovering grammar snob” — funny!

Literacy Privilege: How I Learned to Check Mine Instead of Making Fun of People’s Grammar on the Internet « Painting the Grey Area.