I've been thinking about this for a few months now.
When I played ME1, my characters tended to be paragon, at worst paragade.
But after my first Jack / Miranda fight I quickly figured out that I needed a certain amount of renegade points to resolve the issue.
Now my Shepards tend to be Rengon ( enough renegade to resolve the Jack/ Miranda fight, enough Paragon to resolve the Tali/Legion fight), and for the most part it feels natural, and for the most part I do what seems right.
But, in order to have sufficient renegade points, to tell Jack & Miranda to STFU, I meta-game Zaeed's loyalty mission. I deliberately take the most renegade option, which bothered me a lot initially, but now, not so much.
This goes to Admiral Cheezes point, I found I could perfectly rationalize letting the workers burn. I did not set the fire, I was locked into a battle with a company of mercs looking to kill me, I already was dead once, did not care to go back, I needed to get back to saving the galaxy, not traipsing through an unfamiliar factory, through explosions and merc, to look for civilians.
You see it right? What the Admiral was saying? I enjoy the renegon play, seems natural now, and fun. But there was a time I would not have made those choices. And the more extreme choice, the Zaeed mission, was soley to get the cookie. Bioware, knowingly or not is playing us.
This is indoctrination! Or at least as close to indoctrination as we can get.