Dumbledmore is ok with it as long as "the end justifies the means."

[justcarol67]

No: HPFGUIDX 95229

vmonte wrote:
<snip>
If Moody was using an unforgivable curse in the school I'm pretty
> sure that DD knew what was going on. I'm also sure that there must be
> some kind of alarm system that tells the headmaster when curses are
> used in school. I know that Moody was not the real Moody when he was
> teaching at Hogwarts, but don't you think that he ended up teaching
> the children something that was to their benefit? Didn't Harry use
> the same method learned in class to later throw Snape out of his
mind (he was also able to read Snape's mind because of this). It seems
to me that fake Moody would not have gone out of his way to teach the
> children how to defend themselves unless it was a direct order from
> DD.
> 
> So, finally, DD was no problem working with criminals or breaking
the law, as long as "the end justifies the means."

Carol:
I don't think we need to credit Fake Moody with teaching Harry how to
(temporarily) reverse Snape's legilmency spell. That's exactly what
*Snape* was trying to get him to do. Notice that he's not angry with
Harry at that point. On the contrary, he seems pleased (despite having
his own privacy violated, which he seems to have anticipated by
placing those other memories in the Pensieve). IIRC (I'd go back to
check if I had time), Harry unwittingly casts a Protego at that point,
which is why the spell bounces back onto Snape and he has to recast it.

As for Fake!Moody teaching the children to defend themselves, that was
the only way he could make sure that someone else, say, Karkaroff,
didn't ruin his plan by Imperioing Harry to keep him from winning the
tournament. It's another case of evil will (the intent to harm) having
fortunate consequences (just as good intentions sometimes have evil
consequences, Harry's refusal to use Sirius's mirror and his
prevention of PP's murder being the examples that jump immediately to
my mind). In any case, the Protego doesn't involve a deliberate effort
by Harry, who also accidentally casts a stinging hex that leaves a
welt on Snape's arm. It's reflexive magic like releasing the snake at
the zoo rather than an act of will. 

Carol, who now suspects that Lily's "ancient magic" involved some form
of Protego, which would be released when baby Harry was struck by an
AK, if and only if she was killed first