I agree with all of this. Here is one of my favorite spots with Steve Irwin tackling the Florida Gator at ESPN headquarters.
http://www.youtube.com/watch?v=pU0UFbxZDGM
I have also read that Steve Irwin purchased land and did many other things that may not be well known, all to preserve wildlife habitat
We all know how important sharks are to the reef systems of the world, if they are killed off the reefs will certainly die with them. Steve Irwin, while wild and over the top did more to show the world creatures most would consider violent and useless really do have a necessary place in our eco system. How many people would watch someone who was mild mannered and tame on tv about such things? I bet not many, it's just the way our world is.