I was never in an actual debate club or class, but in college they said one of the best ways to get an "A" from some philosophy professors was to disagree with them. In a civil manner, of course. A few of them actually seemed to relish civilized discourse.
From reading the link in the original post, if I were a debater and had one of those ADMITTEDLY biased judges . . . I would likely use what little time I would have (before they cut my mike) to call out the biased judge, denounce the process as a fraud and a sham, and walk off. And thinking back to my high school and college classmates, many - perhaps most - of them would do the same.
Don't play their games.
(Good advice for today's female high school and college athletes who are tossed into competition with female impersonators.)