The consequences of stopping the broadcast would have been grim.
The show must go on– the kingdom of Edinburgh kept this philosophy alive while it was trying to suppress the negative impact of the infiltrators on the graduation event.
The compromised faction of the moderators as well as the infiltrators did not stop the live feed completely. At first, they showed the battles between genuine competitors.
However, Adam took over the broadcasting tower and started filtering out almost all the battles that had infiltrators' involvement in any form. As a result, live feed only covered battles that were genuine and did not have a foreign hand.
Of course, Adam was only supposed to do this until he ensured that the broadcasting wouldn't be completely stopped by the kingdom of Edinburgh. He was supposed to focus on the infiltrators' victory over the participants later on after the initial die had been cast.