Do the good intentions excuse environmental scientists who oversimplify to get attention?

The Method of Lies vs. the Method of Truth: “The sincerity of the propagandist is no protection; some of the worst excesses in history were engineered by persons motivated by zealous belief.” Julian Simon

Note particularly the (unsourced) quotation from Stephen Schneider, describing how environmental scientists manipulate the media in order to get attention: “[W]e have to offer up scary scenarios, make simplified, dramatic statements, and make little mention of any doubts we might have.”