The Delphi Technique was developed by the Rand Corporation for use by the Department of Defense as a psychological tool to control people. Dissenters are singled out, and dismissed or ridiculed to diminish their credibility. It is simply a psychological technique to "divide and conquer" and is used by churches, businesses, etc.
It is abused, as you say, by folks who wish to drive a meeting to a predetermined conclusion.
A good article here:
http://www.freerepublic.com/forum/a37b321093ce6.htm
Most people don't even realize it's happening, it's become such a natural part of our society. You learn nothing but how to manipulate via the delphi process too.
http://www.newswithviews.com/PaulProctor/proctor8.htm
Facilitators of Diaprax always minimize the importance of scriptural knowledge (facts) and didactic teaching (lectures) in order to successfully seduce their subjects into group participation with un-offensive human interaction, superficial edutainment, non-threatening worshiptainment and dialectic team-building techniques. Diaprax doesnt teach anyone anything except how to THINK, FEEL and EXPERIENCE what everyone else is thinking, feeling and experiencing. The only thing learned by Diaprax is the process itself. What Diaprax is REALLY all about is unlearning your core valuesletting go of anything that keeps you from moving toward the new paradigm of global harmony. Its about turning ones ears from the Ancient of Days to the latest noise on the street for spiritual guidance and direction.
Here's another good article: