Freighties knowledge base...
It would seem that the Freighties as a whole know a considerable amount about the Island, Ben, Oceanic Flight 815 etc:
Matthew Abaddon: Ring leader? Passed himself off as Oceanic lawyer, when clearly not. Knows about the Island. Sent the team to the Island after Ben. Seems interested in if there are survivors.
Naomi Dorrit: Handpicked "team leader." Designated to guide select team to the Island. Seemed to feel as if the potential for survivors from OF815 exists. Had picture of Penny and Desmond. Claims to be looking for Desmond.
Daniel Faraday: Physicist and all around "genius." Seems to have a personal connection to OF815.
Frank Lapidus: Pilot. Supposed to have been the pilot for OF815. Switched at last minute? Poured over plane manifest. Knows Juliet wasn't a passenger. Important.
Charlotte Lewis: Anthropologist. Encountered DI artifacts in Tunisia. Seems to view landing on the Island as a realization of a life long dream. Interested in number of survivors. Amazed Aaron was born on the Island.
Miles Straum: "Ghostbuster." Can communicate with the "dead"? Non-plussed at finding the Losties alive. Has a picture of Ben, who appears to be his (their) primary target,
The flip side is Ben knows who they are too (via his "man"-Michael I would assume), and view them as a threat.
The question is, how does this group have all this knowledge? DI remnant in the outside world?