G0-T0 can tell the spacers and smugglers whatever he likes. You know what they're going to tell him?
"Piss off, ******!" ... or something of that nature. If a Sith warfleet attacks Nar Shadaa, no one is going to orchestrate a heroic defense of the planet, the smugglers are going to get the heck out of dodge as fast as they can jump to lightspeed.
This made me lol I can just imagine the smugglers and BH's saying "**** this ****!" and getting outta there. I would imagine things would be different, if it weren't a sith fleet though or if tech wasn't the same, then the smugglers/bhs and the like might do something.