Dr.Tellez,
I am sure feeding anything changes behavior and most often change to the negative.
You said the presence of crocodiles on the island can be a great eco-tourist attraction that can bring more income to islanders as seen in other parts of the world in which crocodiles inhabit.

and I agree. The photos above are part of a tourist excursion that cost $329.usd and employs three guides. The crocks are fed Lionfish to attract them. It is an excursion that is popular world wide and creates as you said, more income to the islanders. It also is big business for the hotels that house these visitors and restaurants that serve them.
This particular trip is at Chinchorro Banks and our Mexican close neighbors enjoy those benefits instead of Belizean Tour Guides.
The world is not perfect and will never be, I hope you dont frustrate yourself too much trying to change it.

White Sands Dive Shop
https://whitesandsdiveshop.com/