I haven't seen this "documentary" but if it is sensational journalism then I really would be upset to waste my time watching it. I hate when I end up seeing crap like that. Even if they are making a good point, I much rather make up my own mind and draw my own conclusions.
With that said, I go to Florida quite frequently, about 6 times a year, and each time I go, I visit SeaWorld, I get the yearly pass. Its my favorite park to go to. They do a lot of good. I'm not saying that they don't do bad, but for me, the experience is something that I enjoy each time. And I'm planning to take my kid when he gets older. Oh, and I'm also planning to take him to the zoo as well. Arguably another evil place.