A theory about the Black Smoke

On season 1, Russeau seems to know a lot about the black
smoke. She says it´s a security system to protect the island. So I got a pretty good clue about this. It rounds the island searching for "intruders", "judges" them and "decides" if they´re okay for the island or not. A good evidence for this theory is when in s04e09 (The Shape of Things to Come), After Keamy kills Alex,Ben enters a secret door in his house, aparently travels in time to outside world,go to London to face Widmore and tells him he would kill his daughter as well, makes some "adjustments" and gets back into his house on the island. Then, he seems to know exactly what is going to happen then, giving instructions for his "friends" to run towards the trees. That´s when the black smoke appears devastating the area, killing some mercenaries from Keamy´s team. In my opinion, the black smoke is "updating" things and facts Ben had just changed in the past (except the assassination of his daughter, afterall, what is done, is done).