"Blackfish" did what any 'successful" documentary wants to achieve, which is to create a polarizing view of a subject that creates real debate, even if it has an agenda. The reality is, ALL successful Oscar-winning caliber documentaries have an agenda. That's what makes them effective! If you think about all the winning documentaries, "Bowling For Columbine", etc... they all have slants and questionable facts... but its more of the debates and arguments they actually start which would not have been started without the film's existence. In this sense, the films are important if only because they ignite discussions on topics that maybe people wouldn't have thought much about previous to watching them.
If all one does is simply watch a documentary and thinks they are then a 'self-proclaimed expert' on the documentary's subject, then they're just as big of a moron as someone who reads a review of the film and thinks they're an expert. The truth always is in the grey area somewhere in between. Every big corporation is bound to have corruption problems, and there's hypocrisies in every group.
What really pains me is all the negative responses towards Robb and Allysia, who I personally know are really good people, and having crazy fanatic PETA nut-cases openly attack them on Facebook and their own forums here, when all they asked was for some rational perspective in the spirit of common sense. That's the trouble with anything polarizing... you're gonna have the people that are sure they are right...make opinions that they're sure are right... have people agree with them that are equally sure they're right... all making wild statements from the walmart laptop in the collective meth lab from trailer-park USA.