Maybe Snape really is DDM!

[potioncat]

No: HPFGUIDX 163694

Valky wrote: 

> If we look at the Dada teacher successively, I think we can see that
> the teachers worst intentions are turned upon them by the curse. 
> 
snip 
> 
> So we come to Lupin and Snape. It's possible Lupin didn't have any 
bad
> intentions to use against him, he lost his job when Snape leaked his
> werewolf status, this was an emotional blow to Lupin, and fitting if
> his worst intentions were to give Snape a hard time ocassionally.

Potioncat:
Hi Valky!!!!

Sticking with your theory for this post, let's look at Lupin again. 
His intention was to keep secrets that he knew he should tell, in 
order to protect his status. (the Animagus Black, the tunnels, the 
map) All those secrets crashed down on him, revealing to others one 
of his secrets and putting others at very big risk. And of course, 
causing him to leave the position of DADA master.

> Valky:
> So what were Snape's worst intentions.... I think they were to
> deceive. And so it is deceit in the end that has turned on him and
> prevented him from returning to the DADA post. 
snip
> 
> And so my conclusion. Snape intended worst of all, to lie, and so 
now
> a lie is his downfall. That is, the lie that he killed Dumbledore.


Potioncat:
I have to think about this. You're now in Pippin's camp---that Snape 
didn't kill DD. I'm not sure, myself, or I think he killed a DD who 
was about to die.