In Dragon Age yes, but in ME it's like this:
SPOILAH
Terrorist: You will let me go.
You: Why would I?
T: Because I have planted a bomb next to the hostages!
Y (renegade answer): No way I'm letting you go.
*PC patiently waits for terrorist to push some buttons*
*Terrorist says something Bond Villain-ish*
*PC patiently waits for terrorist to push some more buttons - an energy field appears between them*
Then the terrorist, keeping his promise, runs to the other side to the map to the exit, and shoots you from there.
AND there wouldn't be nothing keeping him from blowing the bomb up when you go to disarm it instead of chasing him.
AND disabling a few "thrusters" won't make an asteroid in frictionless space stop.