when in cyrodil are we going to be able to kill people of the same faction dark elf vs dark elf kind of thing or atleast a dueling system

nope.

No internal fighting I'm afraid =/ but we might be seeing a dueling system later on if the demand is there ( which it is ).

Ummm...............Why would we be able to attack our allies? That does not even make sense.

Do you honestly believe there aren't people who are interested in killing everyone >_>?

....Like me, for example? Hell I've had a burning desire to purge the real world of all human life as we know it several times over, why wouldn't I want to do it in a game?

For the sake of realism and freedom, I suppose. But the real question is, should we? Is it worth it? Like in the real world. If they had implemented that there could be a system in the way like a bounty system, or with the crime-system they're bringing along later on.
But it's safe to say we wont be able to kill people of the same faction in this game, it's simply not that kind of a game. Freedom like that usually belongs with sandbox games.

It could just be a friendly competition, not a death match. Two allies just wanting to see who's better.

I for one would love to kill all of you and watch you squirm.

...

In-game, that is.