This reminded me of something else that rustles my jimmies: people who draft work emails, flyers/semi-official documents meant for the whole company, or the general public in the same vernacular as that in which they speak.
I have friends with kids old enough to write papers for school who will occasionally ask me to look over their draft and give them notes (because I wrote many papers in college and I have a law degree, etc.). I swear 99% of the papers, emails, and flyers I read were written by someone generating the content by having a one-sided conversation with himself and then writing down what they he heard himself say out loud. In other words, if reading your writing is exactly the same as listening to you flap your yapper, you're doing it wrong and you should feel bad.