Here's my idea of what they do, exactly what we said they should do a couple weeks ago. With the Others roaming about the whole island like nomads, i bet the Losties go back the barracks, arm the fence and bang, they are all safe and the Others are locked out. But that's what I would do.. of course if I lived on the island, ALL the chicks would be pregnant and I'd have Smokey on a leash chasing Ben around.