My point was that every death that happens in 'The Lost World' is the result of a bad decision on the part of the protagonists, which is true. The InGen guys had their camp under control, sabotaging it forces the camp to move and they get attacked by all sorts of dinosaurs on their way to radio for help. Trying to help the baby T-rex was a bad idea, and it gets Eddie killed. Sabotaging Roland's hunting mission was a bad idea, and results in a T-rex loose on the mainland.
Seriously if Sarah and Nick hadn't been on the island, not a single thing would have gone wrong as far as we could see ("life finding a way" aside).
As for a dino zoo actually working, that's pretty much the premise for my Jurassic Park IV plot idea. :p
Well, the park does work, for a while, and then... life finds a way.
The "chaos theory" thing wasn't really played very well in the first movie (or at least not as well as the book). Nedry sabotages the park and the dinosaurs get loose, it's really what you'd expect. The only really unexpected thing that happens is the raptors breeding. Like, Nedry switched off all the fences, so the dinosaurs getting loose was pretty inevitable. In my JP4 idea, it's a bit more of a "small actions snowball into big consequences" idea.