It's all good as long as he convincingly knocks them out or disables them. The batdude(batbro? dudeman?) has never really been much of a killer. I always think of him like spiderman, stopping them long enough for the cops to show up and find them in a humiliating position.
I must be watching too much of the 60s batman. They need to hurry up with the next Dark Knight movie.
I haven't played it yet. If it's good I may pick it up. You know me, I hardly ever play my 360 anymore. I still haven't finished Arkham Asylum yet. I need to get back to that. It's balancing the time.