Isn't the corollary of unregulated finance taking the law into your own hands when someone steals your stuff?
AFAIK no one who has had money stolen in any of the countless bitcoin scams like BMR, Sheep, etc. used vigilante justice, even though many of them threatened to.
Talk is cheap.
What does it mean for bitcoin to be unregulated? Do people want bitcoin regulated and how?
Is someone stealing your bitcoins illegal? What if an exchange steals your bitcoins? What if you conduct a transaction in bitcoins and you never receive the bitcoins? What if someone conducts a ponzi scheme with bitcoins? Would front running and faking trading activity be legal?
EDIT: Note I hold no bitcoins, never have, nor am I shorting them so I have no skin in the game.
It's one of those things you can't really know in those cases.