To be fair to John Hammond, I'm not sure creating a (albeit massive) social networking service is in the same league as reverse engineering 65+ million year old, fragmented DNA strands, then bringing the dinosaurs not only to term, but healthy adulthood, and finally housing them in a multi-billion dollar facility on a leased island.
Facebook has roughly 4x as much source code as Jurassic Park did, and probably can't be run from a single room for up to three days with minimal staff.
Also, if say, Facebook Profiles breaks down, the profiles don't eat the users.