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

[vmonte]

No: HPFGUIDX 95160

Janet Anderson wrote:
First, we already know that Dumbledore is not averse to working with
Mundungus Fletcher, who is not only a thief, but not even a reformed
thief he's receiving stolen goods while working for the OoP, and
(which I personally consider much worse) steals silverware from
Grimmauld Place, which means he is either stealing from Sirius or
Molly who are a) his hosts and b) his fellow order members. So a
criminal record, past or present, or even ongoing criminal activity
wouldn't necessarily preclude someone's working for Dumbledore; it's
probably something he decides on a case-by-case basis depending on
circumstances and (more importantly) his knowledge of the person.

Secondly, I think that Dumbledore's trust of Snape is the most
powerful element in his reformation -- whatever the reasons (and
wouldn't we all like to know) behind this mutual trust, I think it
overcomes anything which took place before Snape changed sides.
Dumbledore probably knows quite a lot about what Snape did while he
was a Death Eater. I believe Snape probably knows, and has used, all
three Unforgiveable Curses. The successful use of those curses
probably does, as many have suggested, either require or produce
undesirable mental or spiritual characteristics -- which is probably
why Dumbledore drew the line at allowing Snape to teach DADA. I
think it's a two-way street -- Dumbledore trusts Snape, and Snape's
knowledge of Dumbledore's trust is the strongest reason for his
loyalty to Dumbledore.

vmonte responds:
Great post Janet.
Dumbledore is also inclined to allow illegal activity.
In GOF, page 230, US version:

"But--but you said it's illegal, Professor," said Hermione
uncertainly as Moody cleared away the desks with a sweep of his wand,
leaving a large space in the middle of the room. "You said--to use it
(the Imperius Curse) against another human was--"
"Dumbledore wants you taught what it feels like," said Moody, his
magical eye swiveling onto Hermione and fixing her with an eerie,
unblinking stare." If you'd rather learn the hard way--when someone's
putting it on you so they can control you completely--fine by me."

Before anyone says that DD did not know what fake Moody was doing...

We already know from conversations between Harry and DD that Harry is
being watched more closely than he could ever know. We know that DD
knew what Ron and Harry saw in the mirror of Erised during CoS, even
though he was never there. There was also the time that Harry began
packing his bags (was it in the Dursley house?) during OOTP --
immediately an owl appears telling Harry he must not leave the house.
We also know that DD often uses the portraits as spys. He probably
also uses the statues, ghosts, and knights in armor the same way.

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."

vivian aka vmonte