not fully, no.
to play out a full scenario, say someone did something unspeakable to a sister of mine -- something so extreme that i am enraged to a murderous pitch. if i do, in fact, murder in this instance, i'd hold myself accountable to the laws set in place.
"taking the law into my own hands," to me, would involve ignoring the law entirely. i.e; i'd commit a crime, then think myself not responsible to fit the punishment.
i wouldn't do that.
if i were ever in a situation where i commit a murder, i'd readily accept the penalty that the laws set in place.