LV motive for picking Draco (Was: DD and Draco's murder attempts)

[Hagrid]

No: HPFGUIDX 153348

> > Ginger:
> > DD was quite surprised about the vanishing cabinets.  On the 
> tower, 
> > (US ch. 27, p. 586-7), DD expresses surprise about it:
> <SNIP of the quote, go UPTHREAD to read it>
> 
> Alla:
> 
> Yes, I also think he did not know about vanishing cabinets, ...
> I am just trying to figure out how much people think DD knew 
> about Draco. Yes, it seems quite clear that he did not know 
> about vanishing cabinets, absolutely, but what else did he know 
> or not known?
> 
>
aussie: 

A big factor in DD's reluctance to intervene would be, DD suspected 
a deeper darker motive behind using Draco to be the assasin.

Certainly, the DE gathered around DD knew to leave it to Draco and 
no-one else do the AK-ing.

- Was it a blood debt that Lucius owed and Draco could pay?
- Was this the DE initiation ceremony? - to be a DE, you need to AK.
- Did LV want Draco to tear his soul?

Of course, Snape lovers will grab on this to show he saved Draco 
from a soul-shattering experience. But that would only work if Snape 
never killed anyone before. Otherwise, Snape would have just damned 
his soul as Draco almost did. So who did Snape kill before? - 
Regulus?

Too many questions. Pick one or more and shoot my ramblings down in 
flames.