Now, that we've all seen the rest of the episodes from Season 4, if not, *spoiler alert*:

The fingerpainting on the chalkboard behind Abaddon when he first appears in the episode looks to me like it's a representation of the freighter. There are 7 circles on what appears to be the front deck (where the helicopter usually lands). I'm guessing they represent 7 of the Losties. I also noticed a lot of circles crossed out and only three circles remaining on the hull side of the boat. These should be the Freighters, and it may illustrate that only three of them survive.

What are others' thoughts on this?