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I see the following problem.
Currently, there are essentially two types of tournaments online.
1. "Seasonal tournaments," where each player chooses who they want to play against. In this case, you can simply avoid playing against a player suspected of cheating.
2. Tournaments with a mandatory initial bracket, either through a draw or other seeding methods, resulting in a situation where you MUST play against the suspected player according to the rules. This situation can particularly arise in team competitions.
It seems to me that we need to consider and discuss the situation in point 2, that is, when a player is suspected of cheating, and people are already avoiding playing against them, but the draw (bracket, Swiss system, etc.) pairs them up. I think everyone understands that if a player has no games played, and the technical support has marked games as not played due to opponents' absences, then that's not really a game.
P.S. Someone posted some off-topic spam, and someone else didn't forget to lower my rating...