Look, are you trying to say that becuase of the |Death Star's loose figther defence a one man fighter may slip through, fire a torpedo dowen the exhaust evnt and start a chain reaction thatcould destroy the whole station?
Even if that WERE possible, such a shot would be impossible, even for a computer
*incoming message through the QDSD speaker system*
.....PPPRRRRRRRR....*blows mike*... Ahem, ladies and gentlemen, honorable guests of the Death Star Diner. I am approaching Bespin with my partner Gundark. We'll be preparing a nice new bar on Cloud City. Enjoy the evacuation and Phinney..... get on your escape ship NOW!!!!!....