OK, because I was getting confused, I went back and re-read that post ... It does seem to me that you've all but explicitly said the folks who sent the unsolicited observations were bad.
But, that's just the semantics of the situation.
Why some people would go out of their way to privately share negative observations is beyond me. And, I'm pretty sure I wouldn't be too pleased to be on the receiving end of such. But, in this case, that would depend on a bunch of information to which I'm not privy.
There are jerks everywhere. And, the more one puts him/herself out there, the more risk one incurs. Of course, there's more opportunity for reward as well ... witness the genesis of this thread.