Better yet, have a dark side NPC in your party purposely mislead you.
"Yes, decapitate that homeless jawa bum with your saber. You're eradicating useless junk in the universe and therefore advocating evolution. Plus 5 lightside points for you!"
See that would be cool, and make it more like the SW universe, in my opinion... ...I don't know if they will do it though, but just having the alignment pop up as an option, I don't think that it would be too hard to do...right? right?