I don't favor brainwashing in any instant.  There is a fine line between brainwashing and operant conditioning.  This film crosses that line.  I am okay with the use of conditioning of SOME sorts for rehabilitation/reformation purposes.  However, when it crosses that line and turns into brainwashing I have an issue with it.  If either of these (brainwashing or "therapeutic" conditioning) is use for the purposes of revenge then I feel that NEITHER of these is okay.