I was just looking back at the Sins Trinity intro video and realized something.. We knew it was on Kron, but we seemed to have forgotten something else..
What comes on the screen at the same time is as follows
Viturska Experimental Transport Lab
Vasari Occupied Kron
10,000 Years Ago
That is followed by a clip of a Vasari hand pressing a button.
Wouldn't that almost guarantee that they unlocked something they weren't supposed to. Now, I suppose your bug idea would work with this, but I disagree simply because I doubt that they'd be running in fear of them plus I don't really find their ships to look insect-like. Honestly, they look more insect like to me..