I recommend all instructors read 'The Savvy Flight Instructor: Secrets of the Successful CFI' by Greg Brown. CFI stands for Certified Flying Instructor in the US, not Chief Flying Instructor - don't get confused.
This book is fantastic and provides an insight into how not to be the instructor that many people are taking about in this thread.
On a second point, I've flown through the Redcliffe/Caboolture CTAF a number of times in the last year to hear an open mic in a Texan ultralight. The instructor is heard abusing and swearing at his students for the whole world to hear. Anyone at Redcliffe knows about this instructor's poor attitude and airmanship, the locals tell me a number of incident reports have been placed.