Wow. What memories this question brings Ozzie!
I personally would go home. There was nothing that bothered me more than waiting while some overzealous arrogant elder want-to-be getting into a heated debate with an Evangelical or Pentecostal or Roman Catholic fanatic. Imagine: two religious nut cases going at it!! There were plenty of those types in our territory, and this one brother--it must have turned him on or something--would go at it with them. He didn't care how long it would take, his goal was to completely overtake the discussion and "prove" them wrong.
One time in the middle of winter we entered into a home where the people were Pentecostals. Again, he went into one of those modes. However, he had the car keys on him, and his wife, sister-in-law and 2 kids were stuck waiting for him outside while he tried to convert these people--about 90 minutes in total. It was so cold that day! She really let him have it when we came back outside. In fact at one point while he was driving back home she jumped out of the car, smashed in a headlight and continued to just walk home.
As you can tell, this particular couple wasn't wound too tight . Poor kids.