I remember Valve placing honeypots that would be impossible for a honest player to see or reach, and banning in mass the players who fall for it after some time to avoid the adaptation of the cheaters. And that is a cheap yet effect way to clean the player base.

Other interesting strategy is to limit the client information available, of the character is not looking with a scope, the client doesn’t need to know if there is another player far in that direction.

Probabilistic analysis is not the only way.

But I know that some strategies would demand major reworks or good planning from the development phase.

Server side anti-cheat should be the focus of every game company with an MMO game in their catalog. Relying on kernel access is madness.

I think he refers to the amount of Linux users playing their game.