At one point during the Czerka/Ithorian Conflict on Telos, a band of Mercenaries attack the Ithorian Complex. You receive a call from Mozo, who is holed up in the vivarium. When you come to his rescue and wipe out the Mercenaries, he thanks you and offers you a keycard. Ask for a reward, and when he offers you none, leave him to fend for himself, and then say "Better you than me". You will receive dark side points. The best part is, you can keep repeating this over and over again for as long as you want for unlimited dark side points!