OK, don't take this as I am endorsing time share because I am indiffernt. But just to further the conversation, I also see it happening at Banyan Bay and sometimes talk with those that have gone through the presentation. Some have commented that they enjoyed the time spent, even if they were not interested in purchasing, as the sales people were polite and offered not just the sales pitch but a lot of info on the island - like tours, restaurants, nightlife, etc.
My point being, not all is "black and white-good or bad". If time shares are presented properly they could be an added benefit to the island. People buying time shares have the incentive to use them - even with high airline prices - use it or loose it.
You know the saying, "make lemonade out of lemons".