Sadly, I think some of it is a way of life and will be tough to change.
Several years ago, we went to Anguilla (which is much less populated and probably more pristine than SXM) for the day and took our local SXM island friend. He would usually rent a car (he is a taxi driver on SXM) and drive us be we opted for a taxi while on Anguilla. He knew the female driver and we had barely left the ferry terminal before she unwrapped a candy bar and the wrapper went right out the window, followed by an empty beverage can. Pretty sad.
