My idea was for any matches, not only B3 matches.
I was in a fed not too long ago and moaned about the walkover that was set against me on purpose. This led to one of the BBs asking for suggestions on how to fix walkovers. This idea was mentioned and I very much support it.
I also suggested making a minimum roster of 3 players (you can't fire or transfer down past the limit). That way, the only possible way to have a walkover is if a team has injured players.
Run of the Mill Canadian Manager