Snape really IS evil

[UNIX4EVR]

No: HPFGUIDX 134183

Having gone back and forth on this one and wanting to think Snape is 
a triple-agent on DD's side I finally concluded he really is evil.

Go back and re-read the discussion with DD and Harry before they 
leave Hogwarts.  Harry tries to warn DD that Draco and Snape will do 
something while they were gone.  DD assures him that the castle is 
protected.

Well, what happens?  

Harry was right.  

If Snape knew about the plan to penetrate Hogwarts via the cabinet 
why didn't he warn DD?  No one knew that Harry and DD were leaving 
except for Ron, Hermione and. . .Snape?

No, unfortunately I agree that Snape really is all bad.  And I'm 
beginning to wonder if (as some here have suggested) Snape isn't the 
real villain of the piece. . .not Voldemort.