Miles is the Incident
Remember that video from abc.com with Pierre Chang? Here’s the link if you haven’t:
Anyway, Pierre Chang (or Dr. Edgar Halliwax, as he pretends to be in this video) totally freaks out when the number 15 bunny appears behind him, because it’s the same bunny he has in his arms. I think that the incident is that He finds out that Miles is really his son, who is also on the island, and they (little Miles and big Miles) somehow come in contact, and something, unfortunate happens. This is why Pierre suddenly banned his wife and son from the island, so essentially, Miles is the cause of his own bastardization! And this also might have something to do with why he can read the minds of dead people.
Perhaps this incident coincides with the 815ers finding each other again.