"Not knowing", or changing one's mind.

[Koen G]

I don't think that the Voynich MS is entirely unique as a field of unbounded amateur attention.
While all cases are different, there is also Egyptology, with its theories about the pyramids and the sphinx(es),
or "life in the universe" (especially when it comes to supposed visits to Earth).
There's much more, and each has its own community.

That is definitely true. It's hard to study ancient Egypt without running into one of the various groups of crazies. There's also some kind of "black theorists" who even go as far as to Photoshop pictures of Egyptian art to make the people in it appear darker. Obviously Egyptians were not black or white, they were Egyptians. They identified by their culture, not their color. But this issue is so extremely emotional and sensitive that here we see even professional scholars taking sides. 

So people going crazy in theory wars and being blinded by what they want to believe is far from unique to Voynich studies.

The real question is though, how can we stand above this? All of us are in over our heads, and we all have some emotional bonds to some hypotheses, pieces of evidence, ideas... How do we ensure that we remain objective?