There's a great bit of research done by David Grossman, an expert on the psychology of killing.  During World War II, the US army did a research study on their soldiers - they found only between 15-20% of riflemen would fire on an exposed enemy, for example.  That's on a battlefield.  People were willing to die, but most of them were not willing to kill.
They fixed it, of course - they now do conditioning processes to debase soldiers, then they rebuild them without the typical societal mores, by rewarding desired behaviours and by dehumanising the enemy.  It's now over 95% are willing to fire.  However, there's incredible levels of mental troubles in soldiers as a result - in fact, recently more soldiers who had returned from battle committed suicide than died in Iraq and Afghanistan in battle.
	
 
		
		
you crack me up, Cindy.  i also enjoy your spicy brains.
	
 
		
		
My Psych 101 prof put me on the spot one day in front of the whole class and asked me if I would ever hesitate to kill had my unit been called into combat.  I told him I'd never thought about it.  Felt like an ass for ever having been in the military.
	
 
		
		
Minor casting thing I shall white out - 
Check out who's on Tim's epi of Dollhouse: [link] - Yep, the dude who keeps beating up Fillion in Drive.
	
 
		
		
Speaking of Nathan Fillion (who's not the minor casting thing), I thought the fake ranger sounded oddly like Mal.
	
 
		
		
That guy has the most amazing eyes. He was, dare  I asy it, hawt on SCC too. 
	
 
		
		
Had to rewatch, and, not only was the dialogue and the voice very Mal-ish, but he even had a similar nose!  I mean, you couldn't park a Cadillac in it on the silver screen, but... (I love NF's nose, so I notice these things.)
	
 
		
		
The security guy - I don't even know his name - at the very end of the episode when he's talking to Echo, he's acting like Joss.  I mean, seriously - check out his speech.