This isn't a court, and it's not even time for a trial; it's already Santa Barbara.

It's just that courts are always like that :D
Order must be maintained by force.)

Added 3 minutes later

:)
What's the point of all this if the guy just wanted to try his best to win the tournament no matter what? In this case, after being disqualified, there's only one way – change his nickname and rejoin the forum. And what's the difference between a ban and a disqualification? I don't see one.

There's no difference. He should definitely change his nickname. And then there are two paths – leave this forum and go to another, or log in here again.

It would already be a sign of respect if he stays with this nickname and learns to play (for now, against the computer). At the same time, after learning something, he will participate in discussions in the topics. Later, I think, he might be allowed to participate, but time will tell. And if he still puts his nickname in a neutral position, or even improves his reputation, then again, it will be pleasant for him to know that he has become a normal gamer from a cheater.