If they set up a jc and you don't go, you will automatically be df'd on the grounds of a bad attitude. That's what happened to hubby. As far as witnesses go 1 Corinthian 13:1, they do not apply it. I supposedly was suppose to have twenty-five accusers from my hall and yet not one story was the same and not one story had two witnesses yet the co said because there were twenty-five with "similar" stories I got publically reproved for discourageing ones from pioneering five years ago. I guess that's where the brazen conduct rule comes in. They can go back as far as they want even if the accusers couldn't remember their stories.
Bottom line-if they like you you won't have to worry about it. If you don't care if you get df'd then don't bother going to any hearings.
Good luck!