After exiling a machiavellian, power hungry, manipulative superman and his crew on an uninhabited planet, Kirk doesn't seem to have notified Starfleet and ensured that some sort of warning beacon was placed in orbit. And also ensured that all Starfleet ships have that little piece of information added to their vast databases.
Fair point but i would'nt class this as a plot hole. It's one of those plot points where you're thinking "come on surely a star fleet captain would've notified the relevant authority figures". But for me i find it entirely believable that Kirk would'nt have done anything of the sort. Knowing Kirk as i feel i do. He does'nt tend to do anything by the book ;-)