Question about Pure Bloods and House of Slytherin

[potioncat]

Kemper:
 
> It is reasonable that Bellatrix along with the Malfoys are unaware 
of Snape's Blood status.  Is there canon support that the Malfoys 
know Snape's lineage?

Potioncat:
I don't see how he could have hidden it. With all the interest in 
purity of blood, someone would have had to ask who the heck the 
Snapes were. 

I think at least some of the Slytherin types are willing to overlook 
ancestry if the witch or wizard in question has the right attitude 
and abilities. It seems most wizards have a Muggle or two in their 
background; some are more careful at hiding it.

 
> Kemper now:
> I would question why wizarding families feel compelled to send 
their children away.  It may not be cold rejection, but it doesn't 
scream warm acceptance.

Potioncat:
For the same reason Muggle families send their magical children away? 
If the norm is to send your 11-year old off to school, then it would 
make sense to send your little Squib to a Muggle school. Depending on 
the family, that child would be just as welcomed home as his siblings-
--or not. And it would be a very different experience depending on 
the family.   
> 
> 
> Potioncat earlier:
>  Neville's description of his self as "almost all Muggle" makes me  
>  wonder if JKR just hadn't decided on Squib at that point, or if 
Alice was Mugggle-born.

Potioncat now:
Oops. Late night. We have canon that Neville is Pureblood. It's been 
asked among ourselves before why Neville says "all Muggle" rather 
than Squib. Perhaps JKR hadn't made up the word yet.
 
> Kemper now:
Unless the Squib was a parent or maybe a grandparent, I don't think 
the future DE would need to hide her lineage.

Potioncat:
Agreed. Between us we've shown the extremes. So, again, I think 
Stacey could make the fic work whichever way she went with it.