Excellent post and great discussion. I'm a relatively new CBJ and more experienced backyard cooker. I don't pretend to speak for KCBS, but in the book they give you at CBJ training, it offers the following "Instructions for Judges"
Do not fraternize with teams. Limit your visiting time with any team.
Do not visit with teams after Judge's Orientation."
Hope this helps the discussion. And putting in a plug for Table Captains. The TCs present your food and help your judges for little or no reward. Adding a seventh serving is entirely within the rules, will offer insurance against getting DQ'd if two of your portions don't get cut apart cleanly, and will give your table captains something to eat, which they don't get otherwise!