Well the example you gave is bad feedback, and would be bad feedback from anyone. But that's not really the point of the discussion at hand, as I understood it. The discussion is about useful feedback that is delivered in a manner that may not be the most kind, but being unkind doesn't make useful feedback and less useful. After all, the feedback that sparked this discussion does seem like useful feedback even if it came across as a bit dismissive.
> the feedback that sparked this discussion does seem like useful feedback
The former was a summary of the latter. The "feedback" we're talking about gave no actual information about what the person thinks is wrong with TFA, it just said that TFA's author is ignorant and maybe look at XYZ.
