Oh, this old question... Hmm.
I am Carter Grey and I am a thief. I'm a damn good one too.
I've robbed the Silver Rush of every single gun and item in the store. While everyone was there, in the middle of the day. I take things from right beneath someone's nose. I do it constantly.
It's referred to as kleptomania, but I'm above such titles.
There's a catch though. I have a soft for people. I can never bring myself to end a life I don't have to, even when they deserve it. I gave Benny a chance at me in the arena.
I don't kill who I don't need to, it just isn't in my nature. I steal from beggars, merchants, soldiers. Anyone really.
I almost always make good moral choices, because I prefer that everyone prosper and the world flourishes again. I'm the bad guy who does things for the right reasons.
Did you read my response?
What if the game was programmed to show you the consequences of your thievery?
For example the beggar died because you stole his water money? And you learned it.
Or when you killed the bully of the town in order to help them and it resulted in someone worse rising to power and start killing towns folk? You taught you were doing them a favor.
Evil does not have boundaries. And it shouldn't have in a computer game like Fallout either.
You cannot really roleplay when the game content is lacking. You are simply hack&slashing in a different way.