Just so you know there's a very intense client modding community centered around the so called anarchy servers, in particular 2b2t. Cheating is allowed on such servers and it actually makes the game very interesting. Examples:
Perhaps the most impressive feat I've seen out of 2B2T was an exploit called "Nocom".
It began with 2B2T being hit with a lag exploit, then that exploit being fixed in a 3-line patch - that patch subtly introduced another exploit that allowed the author to track the position of every player in the server at all times, down to the chunk.
I won't explain the whole video[0], but it details a story of gaslighting, 3 years of player data, and some really really impressive technical work, given this is all over a block game.
And while certainly not to the scale of Minecraft, Counter-Strike does have a (diminishing) sizeable community of cheaters that majorly play against each other, competing in technique and configuration, called Hack-vs-Hack (HvH).
- Rusherhack: movement, combat, awareness, ... your bread and butter type of a client mod: https://www.youtube.com/watch?v=Dg1BoHX7bJo
- Baritone: autonomous actions, including pathing, mining and even autonomous building from schematics: https://www.youtube.com/watch?v=CZkLXWo4Fg4
Anarchy is something rather unique, I don't think this type of environment/community exists in any other game.