There are degrees of darkness in dark side actions, you know. Attacking an innocent person with a lightsaber is evil. Actions like that change your nature into a soulless person, but not necessarily a puppet of the dark side (think Adm. Karath). Attacking an innocent person with the Force is an evil action performed through the dark side. That makes you evil, soulless, and a slave of the dark side. Attacking an innocent with the Force in anger, not only makes you a slave of the dark side, but also a pawn of your own emotions. In the K2 website you can read 'Your mastery of the DS is only surpassed by your animal rage'. Very enlightening on the nature of darksiders.
Using the force to cause harm to living beings, be it directly through choking, lightning, or indirectly, by say, bringing the ceiling down on your enemy, is considered giving in to the dark side. A Jedi can never find an excuse to do that kind of things. In fact you will find that most Jedi masters would rather die (and yes, let others die) than use the Force with ill intent.
Now, I can understand the need for some degree of adjustment to these rules in order to make them fit into a cRPG. But going past anything like Force Wave is crossing the line.