I remember when there was a bunch of people accusing the devs of sexism and homophobia when female viera and male hrothgar were first announced.
Some would argue that the lack of male viera and female hrothgar was a flaw, and some genuienly believed it was sexist (not that I would agree). So naturally, these people left feedback... but it was laced with vitriol towards the devs.
I don't think the feedback in regards to adding male veira/female hrothgar was unjustified, but the attacks and accusations towards the devs were. And some of those posts flew under the radar because they were disguised enough to the point where it wasn't technically against the ToS, but it was still rude and uncalled for.
Yoshi P is just asking people to be polite when leaving feedback. Negative feedback is ok, but there's no need to attack the devs. That's all there is to it.