Hi Friends.. :)
I can understand your apprehensions. But don't you think that eventhough these discussions might help you to do away with 2-3 chapters, but the time required to do those 2-3 chapters will be certainly less than what you invest in discussing these things.
So, It would be better if you start focussing and preparing for the exams instead of spending time in just discussing.
And its my personal experience, doing something productive or learning a new topic does help!
:)