I have a good friend who is in business for herself. Client base is City and professional services. I also have my own business and work with her occasionally.
However, her writing style and grammar are, in my opinion, not good. One particular thing that really stands out is her using "should of" or "could of" rather than "should have" or "could have". I mentioned it to her once and she said it was because she was dyslexic so I haven't mentioned it again.
It's really bothering me though. What would you do, as pedants or otherwise?