Yes, using the Bible scares them, they just don't have a snappy comeback. I recall in the early 90's I began to use the scriptures at the Bible study. I would hear gasps from others, ie, I was going out of the assigned comments and including scriptures in my comments. I will never forget a brother was there to conduct the study, he was a fill in. No one knew him. He was also using the scriptures and was so happy I was too. You would not believe the looks people gave us both, like we had 2 heads or something. He and I exchanged knowing looks. I wonder where he is now? One of us , most likely.
Seriously, we were just using the scriptures, scriptures in addition to the canned comments. Reading from the NWT , too. They are afraid of the Bible.