If someone makes another hashtag with the same purpose as GamerGate, they won't be the leaders or accountable for it either. In other words, trying to change from GamerGate to something else will only result in the same thing, some vile people coming in, also taking the mantle for themselves and using it for reasons decent people don't want to use it for. There is no way whatsoever to make any hashtag with the same intentions as gamergate without it coming with the unfortunate consequence of a number of misogynistic and sexist loonies backing it up.
This statement I think speaks volumes about the problems with the intentions of GamerGate. "It doesn't matter what we call it, because nightmare people will flood in to support it regardless." Think about that.