Similar thing is happening/will happen to the Azores, especially the island of Sao Miguel. Low cost flights have opened the island to mass tourism. If properly regulated, and if the spirit of the place is preserved, its not necessarily bad.
There are ways to prevent this: make the place expensive enough, so not many can afford to visit. Restrict the number of visitors. Etc.
The problem is, tourism is a nice source of income for the local populations, so it's not easy...