What makes you think this was intended as a pure complaint they did blame optifine which is an allowed modOptifine is allowed. If you got banned you can always appeal before opening a post complaining about it you know.
Well it is allowed mainly in Classic PvPIt's not allowed
But in the rest of the server it is still allowed just not a very good idea
Okay firstly it didn't ban you for using those modsWhat a legend. I'd say this happens more than CubeCraft's 'reputation' would like. I think it happened to me, I was only using LabyMod and OptiFine, and *poof* some glitchy anticheat that a determined 2 year old could make better banned me.
Secondly I doubt you could make a better anti-cheat by yourself which is completely custom