I am a big believer in transponder codes being a problem if a ship is stolen or you attack Imperials directly. This does bring up GM challenges though.
The Long Arm of the Hutt suggests if the PCs go back to Tatooine on the Krayt Fang, they will have the same entry as exit... Tie Fighters. But if they are fighting TIEs, then what about the ship they come from? Why wouldn't they REALLY draw wrath when they attempt/make planetfall? How do they lose an ISD (or whatever) carries the TIEs when the planet is being watched? Maybe I'm just tired, but I'm struggling.