What countries are these? I've done self-guided shore diving in the Cayman Islands (Grand Cayman), Honduras (Roatan), and Mexico (Cozumel). Along with the Netherlands Antilles, that's at least twice a couple. I'm also under the impression there aren't any rules against it in Belize or the U.S. (Florida Keys), though I've admittedly never done shore dives in the latter two, only self-guided boat dives.Lets see I have been a lot of places in the old Caribbean and only a couple of them offer self guided shore diving! Most other countries require you to have a local DM and to let you go off on your own is unique to only a few Caribbean state islands!
Though I agree that Bonaire (and Curacao) are unique in that renting a vehicle to park in some isolated spot to go shore diving is more the norm than the exception, and the sheer number of dive sites (50+) combined with a small population (14,000?) make it difficult for the small police force to be everywhere at once. Of course there aren't more incidents of rental car theft at shore dive sites in Roatan or Cozumel or many other places in the Caribbean because no one is driving themselves and parking to do a shore dive.
Now the U.S., that's another story. Talk about a country where theft is rampant. Why don't those silly Americans do anything about it?
From Time Magazine: (When Your Rental Car Gets Robbed - TIME)
"According to the Honolulu Police Department, 10,605 cars were broken into in 2007, the latest year for which statistics are available. The numbers don't distinguish between rental cars and privately owned vehicles, but police department spokesperson Michelle Yu says that thieves most often target cars parked near popular tourist attractions, knowing that visitors often carry cameras, money, jewelry and other things worth stealing. . . .
"That's no surprise if you've been to Hawaii and seen the ubiquitous signs warning tourists to lock their cars and remove any valuables. And many travel books and online message boards carry specific warnings for Hawaii about break-ins. One useful piece of advice: If you see broken glass in a parking lot, don't park there. That glass probably means it's a prime hunting ground for thieves."
At least on Bonaire you don't have worry about broken glass on the ground. Most driver-tourists there are polite enough to leave their doors unlocked and windows rolled down.