It appears the 'fanzines' wanted to be seen, by the supporters' as proactive.
I don't believe they thought, for a second, their statement would have any effect.
They didn't have a Plan B so now don't know how to react.
There's no follow up statement and they've now cut all lines of communication with Donald.
They've alienated themselves from the supporters they purport to represent by speaking out in a rabble rousing arbitrary fashion.
In truth they've handled the whole thing as badly as the people they're accusing of bad practice.
This is the consequence of social media of which Donald, the fanzines and, to an extent, people on forums are a part.