Dark Book, was Re: Dark Magic (+ a little Marietta)/Karma and the Twins

[Carol]

No: HPFGUIDX 176939

Carol earlier:
> > At any rate, there's no indication that Neville, for example, has
"learned and practiced Unforgiveable Curses." 
> 
> lizzyben:
> 
> Only because Neville refused to do it! And he was then tortured
himself as punishment for refusing. How many students are going to
have Neville's courage to stand up to the Carrows? Students were
REQUIRED to practice the Unforgiveable Curses against other students
as part of their class. 

Carol responds:
Required to practice the Unforgiveables on each other? Can you support
that with canon, please? 

We only know of two students who used the Cruciatus Curse on others
(in detentions, not in class). No instance of students Imperioing each
other is mentioned. And if they used Avada Kedavra against each other,
half the student population would be dead. You can't practice the
Killing Curse on another person without committing murder.

Luna says that she's never even Stunned a person outside the DA
lessons before she Stuns Alecto Carrow (DH Am. ed. 589). I don't get
the impression that she's been Crucioing or Imperioing anybody, and
she's a sixth year. (Granted, she was kidnapped in December and missed
most of the year.) Students under seventeen are kept out of the battle
(unless they sneak in) because they can't defend themselves. If they
could cast AK and kill the DEs, there'd be no need to protect them. 

I've already mentioned that students below at least fifth year
canonically lack the power and ability to perform these spells. And
Neville, of course, is a seventh-year, as are Crabbe and Goyle, the
only students we know of who use or attempt to use one or more of the
Unforgiveable Curses at Hogwarts.

Carol, who thinks that Neville's reports would have focused on carnage
in the corridors rather than the Carrrows' detentions if your view
were correct