A couple real examples:
If a brother who is an MS/Elder is found out to be an adulterer, molester, embezzler, etc you this strategy. We had an elder who had been carrying on an affair for EIGHT years before his wife discovered it. In that time period he was promoted from MS to Elder and received many important assembly/convention parts. HOW DID THE HOLY SPIRIT NOT KNOW THIS WAS GOING ON? One can see how he can deceive his wife, fellow elders, even the CO (who makes these appointments), BUT CAN YOU DECEIVE THE HOLY SPIRIT? Or, is this evidence that the Holy Spirit is NOT really behind these decisions?
If someone is shunning their inactive family members (as this is happening a lot lately): Where do they get authority to take this position? The Cong/Borg (as guided by Holy Spirit) has not seen to DF this person. DF is what requires shunning. Under the Law in Israel, if a person went beyond the Spirit Directed punishment, that person was condemned. For example, if a man was a thief and stole the bull of a fellow Israelite and the owner of the animal KILLED the thief, what would happen? The owner would be put to death because he went beyond the words of the Law (which was given by God's Holy Spirit). So who gives any JW authority to exercise a punishment against a fellow JW that HAS NOT been deemed appropriate by Jehovah's Organization?
Blood fractions is an easily argued subject. Tell your doctor you will now accept transfusions of "blood fractions". The medical community does not have a concept of "fractions" beyond plasma, red cells, white cells, platelets (the separate components you get when blood is centrifuged). Where in the Bible does it say it is OK to accept ANY part of human blood? Are these Pharisaic man-made rules (such as those condemned by Jesus)? What about all the JW's that died the year before the GB determined they could have accepted "fractions of blood" and been saved? Is this really how the Holy Spirit works?
Once you are at school or on a secular job, you can say a fellow worker or student asked you questions that you need to know how to defend. Always pass the doubt off to someone else when you can.
Good luck