I'll grant it might have been unprofessional, but we're also talking about Casey's personal twitter and his personal project that he streams to the world for free.

I guess I come from a different culture/generation, where if someone is doing as badly at their jobs as a lot of people at Microsoft are right now, then it is acceptable to call them out on it. I mean christ, we live in a world where it's ok to fire people expressing a mildly controversial opinion at work when asked to do so , or over tweets they made in the distant past that they've long since apologized for, but we have to treat people who are really crap at their jobs with kid gloves?