I know nothing about GI Joe and didn't know about that. If I were in that fandom, and if there were sexism involved, I would be complaining about that too.

And sexism makes me angry, and I feel bad for the victims of it no matter if it is a normal thing in their industry or not. And also, even if you think firing her was awesome, the way it was done was still not okay. Not telling her so she had to find out via twitter is just wrong no matter if the actual firing was justified.