Kristi Miller-Saunders, who was the principle author of the paper on Salmon death, wasn't allowed to speak to the media, but her non-government co-authors were.
And there is the giant hole in your argument. It's so large I could fly a jumbo jet through it. Scientists in universities are free to speak to the media! These scientists are employees of the university. They are not controlled by media departments. That is truly gagging debate!
It's funny how the government was happy for political media officers to control the message, officers who didn't understand the research as well as the lead author or researchers if scientific studies. Yet that is what you consider unbiased? I mean, your entire argument is that the government must protect the general public from misinformation yet it is the government who is deciding what the scientists can and cannot say... If they stop a scientist from speaking because they believe they are inaccurately explaining their own work, well that's absurd.
If the government is concerned that scientists can't communicate to the media, then I wonder when they might decide that scientists published papers might be potentially misleading and require a media officer to vet them. Peer review by public relations, if you will.
As for the slime mild story, could you tell us more? I don't see any mention of that in the story.