We don't even know if those skulls were real. Its like Starbuck said, the Cylons have fooled alot of people. I don't buy into their side of the story as shown by Baltar.
And maybe its just me, but the Baltar character is starting to get a bit old. The whole "I'm out of my gord but no one really notices" bit is wearing thin. I liked the original incarnation of Baltar, he was far more sinister, more self serving. This one is simply a weak minded fool.
These aren't the droids you're looking for...