Simple spell origin, Krum, Slytherins, Prefects

[Jim Ferer <jferer@yahoo.com>]

No: HPFGUIDX 48873

Anne:"It was Ron who said, "Everyone knows that there wasn't a witch or 
wizard that went bad that wasn't from Slytherin." 

Hagrid said pretty much the same thing, but I don't think in either
case that makes it infallible.  Characters, like real people, don't
say things precisely and aren't necessarily right.  It's only when the
"narrator" says something that we need to take it as read.

But what does this say about wizard attitutdes towards the Slytherins?
Dean Thomas(was it him?) says the same thing in CoS and suggests the
Slytherins should all be tossed out. 

Also, if Ron is speaking completely literally, then Sirius must have
been a Slytherin, for Ron surely knows about him. I have a hard time
believing Sirius was a Slytherin.

It sure seems like the majority of baddies are Slytherins, but I don't
think if we run into a bad guy he must be a Slytherin.