Should the island lose its protective barrier and become infected with the Taint, we have a backup plan to avoid widespread panic and reduce the effects the Taint has on the human psyche.
In various locations around the island we have constructed towers that produce a low-level frequency which causes memory loss, it can also be used to inject false memories. With this frequency it is possible to cause the listener to forget about people, places, or events and replace them. With these towers the islanders shall forget about the Taint and believe that the creatures roaming the land are a normality. We cannot divulge who designed these towers or where the construction methods originate from.
With these towers we hope to buy a little more time to figure out a way to save the last of humanity should the Taint loom over the island. The towers should only be used as a last resort, so far they have only been tested on a small collection of people.