I love the fact that Ben has been on the island for most of his life.
Locke has no clue
But he's still a legend!!
Check this - Remember when Ben set the gas on all the hostiles - Well he will tell Locke to do that again!
Guess who will have to stop him . . . . . . Jack, kate, and the french chick
How will they found out . . . . . . Desmond
Just a thought.