The reactions arent necessarily fake, its much more that they hunt out and push those (very small number) for the sake of publicity; and to offset and undermine the credibility of critics.
No one really hears any attacks against GB 2016's critics now, but before release, they were all tantamount to racists and sexists.
Or are we just assuming that all such reactions (e.g. the anti-black Ariel folks) are faked to generate support?