Maybe they could fetch a half-dozen sharks from the ocean, let them swim around the lagoon for a few days without food, then toss the executives in.
Nah, the sharks wouldn't bother them; professional courtesy.......lol.
Seriously though, I like the OPs idea. It wouldn't cost a lot compared to other uses and it would entertain enough people to effectively lower the crowds a bit. Plus, if done well, it would look great.