In Renegade killing is something that you do so you can accomplish a higher goal rather than in other FPS games that's all you do. Early ingame you should take your soldier and go frag some ****. That's the best thing to do. If everyones camped up in the base then just insert some lead into the harvester. Later in game when you have characters then it's better sometimes to avoid fights as long as the enemy doesn't pose a huge threat or someone else on your team can take care of it better with less loss.Basically if you see someone that sees you it's better that you shoot first. Unlike what you said you shouldn't abide by international law and only shoot when shot at.