The lights are on
First off, you will need to pass the first section, which includes destroying the 3 turrets. At this point you will need to choose a type of infantry(doesnt matter which one) choose a side you wanna take on and once the captain stops and asks you what do you want to do, tell him to wait and then kill your infantry (without him seeing you) then talk to him and request more infantry. Repeat this as many times as you want.
Does this result in negative karma?