[HPforGrownups] Can Slytherins be ALL bad?

[Andrea Grevera]

No: HPFGUIDX 143700

  Bart:
  >> This brings up a problem with the lack of a 3rd dimension in 
  much of JKR's writing. In OOP, I was rather disappointed when 
  no Slytherins joined the DA. I had figured that was a good point 
  for JKR to add a dimension to the House of Slytherin. <<

  Andie:
  I've always felt that Slytherins were NOT invited, told about, or 
  otherwise let in on the DA. 
  From HRH's POV there isn't a Slytherin that could be trusted and 
  since the Slytherins joined up with Umbridge as her Inquisition 
  Squad how can you blame them.