Stupidity: During the auction, we see the dinosaurs are brought into the room and placed in the middle. Thus blocking half of the bidders from the auctioneer's view. (01:16:40)
Stupidity: This film reveals that the theme park was built upon a dormant volcano. This means that John Hammond either neglected to do a geological survey when picking a location for his park, or simply ignored it and foolishly gambled that the volcano would never erupt.
Suggested correction: Lots of people live right next to dormant volcanos. It can be thousands of years before a dormant volcano erupts. Might be a risk, but not as much as lets say living on a tectonic boundary or in tornado alley.
There's a difference between assuming the risk of living in an area prone to a natural disaster versus building a theme park that's completely reliant on tourism revenue in an area prone to a natural disaster. If a person's home is destroyed by a volcano, they can eventually get a new home, even if it takes a year or two. If a multi-billion dollar theme park is destroyed by a volcano, it's not something that can be replaced so easily, especially since no insurance company in their right mind would cover any of it. Additionally, the island in this film is fictional, which means the writers deliberately chose for a volcanic eruption to be the reason for the evacuation, when they could have just as easily made it so that the military decides to carpet-bomb the island or send in ground troops to gun down all the dinosaurs.
A dormant volcano is a dormant volcano, no reason to think it will erupt only years after you build a theme park on it. The area is not "prone" to a natural disaster. The eruption is a total surprise. Vesuvius erupts once every 2 decades or something and a lot more than a simple theme park is inside its destruction zone (red zone), including 800,000 people. And that is an active volcano. Take a look at Carney Park, a military recreational facility on top of a dormant volcano. Stupid?
Also, the examples you gave are areas with civilian populations that rely on those types of attractions to help stimulate the local economy. Isla Nublar is a privately owned island with no civilian population to speak of, other than park employees, meaning it is 100% reliant on tourism for its revenue.
How many theme parks are built in California, which is severely prone to earthquakes?
That's not an apples to apples comparison. California has a heavy civilian population and theme parks help contribute to their economy. Jurassic World is located on an isolated island with no civilian population and has to rely completely on tourism to stay in business.
Stupidity: Why did no guards come before/after the hard-headed dinosaur knocked through the wall between the cages? From later in the movie we could see the cages being monitored on a screen. Surely there would be someone keeping watch to make sure the dinosaurs were OK prior to their auctioning?
Stupidity: Being trapped in the control room, Claire and Franklin opened a gate to the old park allowing a dinosaur to enter (as seen on a screen). Rather than making their escape they waited for the carnivorous dinosaur to show up.
