Harry's Use of Cruciatus curse/Killing Voldemort?

[huntergreen_3]

No: HPFGUIDX 110017

Finwitch wrote:
>>> 2) For Harry's part, it was an *attempt*, not actual using of the
curse. I don't know whether an attempt is punishable. <<<

Kemper replied:
>> 2) Harry's 'attempted' use of the unforgivable curse does not make
it ok. Sure, it may not deserve a life sentence in Azkaban, but the
attempted pain/assault may get some time there. <<

HunterGreen:
I don't know about that. 

" 'Now. . . those three curses - Avada Kedavra, Imperius, and 
Cruciatus - are known as the Unforgivable Curses. The use of any one 
of them on a fellow human being is enough to earn a life sentence in 
Azkaban.' "
[GoF, chpt 14, pg 217, US edition]

Pay attention to the wording there. 'Is enough', not 'will'. 
Otherwise there's no reason Moody (or any other teacher) would have 
got away with putting the imperius curse on students in class. Harry 
was in battle, he was using other dark curses and hexes and all that, 
and while the use of one of those *alone* may not be enough to get in 
a life sentence in Azkaban, I'm sure that if a wizard was walking 
down the street and just tossed one of them off at someone with no 
provocation they would get in *some* trouble. I think using crucio 
turning into a life sentence would be in the case of Umbridge using 
it against Harry for example. Bellatrix was an escaped Death Eater, 
and was making her way out of the MoM, Harry (even if his reasons for 
using that particular curse was because of other emotions) was trying 
to stop her from leaving. If someone found out about it (which they 
never would anyway) I doubt anyone would care enough to prosecute him 
(unless it was another attempt to get at Harry). 

Finwitch:
>>> 3) Why do they specialize three curses as unforgivable? My theory 
is that it has to do with required emotion in order to accomplish one 
of them... I mean, it's one thing to want to hurt someone in anger and
even hurting them as such, but to *enjoy* doing it!!! <<<

HunterGreen:
But they are already bad enough without that. Avada kedarva is *only* 
a killing curse, and there is no way to block it. Imperius forces 
people to do things against their will, and crucio causes unbearable 
pain. Those are all extreme enough to ban. We know that crucio 
requires certain emotions, but imperius and AK might not require 
that. Crucio is about causing pain and nothing else, so it makes 
sense that it would require certain emotions to summon it (like 
expecto patronum). The other to might just need a certain amount of 
practice and power to do correctly.