Well, and it could be that he didn't want to be like Sully from Monsters, Inc. and scare the "little ones" to death. It might get his recruits all worked up if they think he can't control his temper and starts disemboweling people right in front of them. It helps keep the "bad guy" arrow pointing at Widmore.
Actually, have we
seen him "go Smokey" recently? Maybe something happened and he can't anymore? The Temple was the last time, right? That was a big show of strength and he took out a lot of people -- maybe he has to build his power back up or something.
(Edit: Is it just me or is the forum having problems? I couldn't even access it for a couple days, and now occasionally I get an "error message" after a post, but yet the post has gone thru OK. Weird... Anyway, for what it's worth, I was soooo glad it came back! Starting to freak out there... if Sledgeweb's site goes kablooey during this last month of "Lost",

...well... we just won't think about that today. We'll think about that tomorrow.)