Well. I still need something to base this on, becuase its all kinda convenient, but doesnt make perfect sense...

we would need to strecth pretty far to, now assume that Smokey is also telepathic (reads minds of potential victims...), has moral/raligious beliefs similar to those of a human from OFF the island... ( since ecko did not ask for fogiveness he gets death) I mean that kinda makes the smoke like God. I would assume that it would be going after a few other people if it were making moral judgements on our characters...

I guess it comes down to this...

We havent seen smokey do any transforming.
We have seen it appear when a character is having visions in the forrest. We have Seen it appear without visions in the forrest.

I think if a dinosaur didnt kill the pilot from season 1 ep 2, then it was smokey...

I would like to hear some sort of feasible explanation for smokey that would logically explain these 3 things:

1. - What he is?

2. - How he would transform?
(The "why" makes sense if hes reading minds and taking the shape of the images he sees, but again why go through all that trouble to become a boar and run after locke, whe you can pound him smokey style)

3. - In What way does killing off the sinners satisfy him?
( is he a celestial being?, don't most major religious teach forgiveness no matter what? doesnt seem like the lords will to me... )

see hes like an attack dog trained to deal with intruders in a certain way. Yes maybe it does a little recon before the dirty deed, but thats easliy progammable.