And that's pretty much the reason why I would like to see the rule go away (except for docking). For all intensive purposes, one lone fighter shouldn't be able to take out a battleship or a destroyer, but again if they want to cruse to Regen their shields, You can always train CD them... and if you do not have train CD's ... And not to mention a few other select weapons, you should not be engaging a cap ship anyway... Again I would think it would be perfectly legit to run away from a cap ship until it goes away, and then go back to whatever you were doing. All said and done, I think it should rely on skill and arms to take out or run away from a cap ship.
And lastly, if you are using your thrusters to take pop shots at Cap ships, it's not going to work... and if a fighter wants to get away from a Cap ship, it usually can.