is this workplace's culture of bullying so bad that even after miwashi left there's still a need to make him look bad? You sound like his boss, judging from the way you think. I don't think he's your problem any more so why don't you keep to the topic of progression instead of taking pot shots at him anonymously?

Or perhaps, you feel that something he said rings true and you see a need to do damage control through character assassination?

Sounds like a certain party we know.. o_o