Hey I think I know that guy. CJC??? The best thing to do is talk it out. (on the ground or in cruise). I have had Captains like that in the past and have gotten into a tight spot or two due to preaching on final. If you are flying per the book, well no worries. It is the Captains airplane, however, sometimes these folks need a reality check. I had to tell a Captain to "lock it up" until we were on the ground. Funny thing was it worked. Everyones different. If all else fails bid a different line. Those people are few and far between! Good Luck