I always wondered what happened to any of the humans who didn't make it to a ship in time to get off New Caprica. Baltar never used the nuke so in theory you could have people in the hundreds who were left stranded. My guess is that they would simple keep on living at the settlement and things might even be easier for them with fewer supplies to be shared with a bigger number of people. You can then fish and grow veggies and fruit to live on. I am also guessing they even had guns to use for hunting any animals around for more food.
Well, no one was rushing the Cylons off the planet. It's entirely possible they imprisoned or executed any stragglers at their leisure.