This subject has been hashed and rehashed continually on this forum, but, after removing the rogue 'small-bite' judge from the equation, I believe that it all boils down to the responsibility of the Table Captain to observe the judges at his/her table and "talk" with any judge who seems more interested in bagging entries than judging them. If the Table Captain cannot sway the judge to take larger bites then they can call over the Contest Rep who can "talk" to the judge and, if the behavior continues, ask the judge to leave and/or bar that judge from future judging.
I am one judge who enjoys my "left-overs" from my judging plate for lunch the next day or two. Occasionally, my wife and I share what we judged with each other to get another opinion. HOWEVER, we ALWAYS take at least two bites from each entry (from different sides of the thigh/rib or different parts of the pork/brisket) to ENSURE that the entry is judged as completely and fairly as possible.
Rather than ban coolers, I believe that the Contest Reps need to emphasize during the "Judges Meeting" that ALL judges must take two bites large enough to adequately judge each entry. If a judge has a problem with eating too much, then they can discretely spit out the sample after judging it.
I was always taught to "clean my plate" at each meal, so throwing away perfectly good food (minus two bites each) goes against my upbringing. However, if coolers are banned I will accept this, as I thoroughly enjoy the judging process and wouldn't think of quitting just because I couldn't take something home.
As far as the health aspect of bagging left-overs from the judges plate, it probably needs to be mentioned by the contest rep during the judge's meeting also, as well as during CBJ training. Many contests that I judge have a waiver that must be signed when applying to judge that contest. I'll take my chances (with the blue-ice bricks in a small insulated cooler) as I have been doing.
Just my humble opinion...