Anyway, it’s interesting that:
1) Ben has the power to summon it (or knows how to do it).
2) It (very big) goes to the mercinaries (presumed).
3) House people have to leave – but Smoky didn’t attack them when 1st summoned (didn’t judge Ben then, but assumed would be danger when came back).

BTW: Here is a montage http://www.youtube.com/watch?v=TaqbyekJHHs&feature=related

We know Smokey has something to do with island justice/judgement and is perhaps ‘a security system’ that can be summoned/called off with that fence. It also seems Smokey can manifest itself into dead-human form. (Note: Ben’s mom only appears to him on the other side of the fence.)

Smokey has many sounds and purposes – judging and letting live def. in the mix.
Could be one that can ‘split’ to many.

I assume that when Eko is chasing his brother around, this is related to Locke’s appearances in season 6 and even Christian, most likely throughout the season.

The MIB manipulated images of the dead in order to achieve his goals. When Christian appeared to Locke in the bottom of the well, he told Locke that he must push the wheel, and bring the Oceanic 6 back. He refused to help Locke up, even though his leg was broken. Just as the other-Locke needed to manipulate Ben into stabbing Jacob, rather than actually doing it himself.

I digress, but the reason this is related to the Smoke Monster, is however the images of Locke and Christian were being manipulated is similar to how Yemi was being manipulated to use Eko. Eko saw through the ruse and was killed. His dying words “You’re next” referred not to Locke’s death, but the fact that whoever was trying to manipulate Eko, would then try to manipulate Locke. Eko was tempted first because his faith was stronger than Locke’s at the time. It was Eko’s death that reaffirmed Locke’s faith, which made him more susceptible to temptation.

When Eko is killed, the smoke monster makes mechanical noises, which are not present at all smoke monster attacks.

CV on the blast door map means Cereberus Vent, which are most likely where Locke and members of Rousseau’s party were pulled underground. But was it pulling them under to be judged, as it did with Ben? I dont think so. I think it pulls you under, and then can pose as you. It drags all the dead bodies under, that is why Yemi’s body is gone, Christian’s coffin is empty. It does not explain how Locke’s body is still present however. I think that is the key to understanding the different appearances. I dont think the other-Locke is the smoke monster, but I think there are at least two.