The problem with trying too much to be unbiased is creating a false balance where there is none. As the above examples with evolution deniers and Holocaust deniers show. Reporting on what the kooks say is unnecessary - unless the story is directly related to denial. Otherwise each evolution or Holocaust news item would have to contain a denier opinion - because they react to all those stories. Setting up kooks against scientists is creating two legitimate sides.

Not doing that, however, requires judgment. Which is just a variety of bias and opinion.