You can be concerned about ethics in game journalism and try to do something about it even though other injustices exist, by my book at least. But the gamergate tag has been effectively taken over by the misogynists and haters. That may not be fair, but it's a fact. If people in the first group continue to use that umbrella they are aiding the people in the second group. Again, not fair, but that's the way it is.
It's incredibly unfair because the members of gamergate that aren't spewing misogyny and hate can't really start another movement, that movement would just be taken over by the same people they are trying to distance themselves from. So they can't distance themselves from the hate and their movement is being attacked because of the hate coming from these interlopers and Gawker/The Media is going to just continue to inflame the haters.