Not now.
But i know he uses Aimbot and wallhack sometimes.
So does my other brother Stefan.
But I think you should bann them because if there is no admin they cheat.
There is only one problem.
Ik don't use it and if you bann them on IP, Do I get banned 2? We are on the same network ofcource.

yes that would block you as well.
so it's best you delete the hacks from his compi and/or prevent him from cheating in the real world

_________________
"Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live."
- Martin Golding

If (your brothers hack) { do as Unclefragger said
else if (they don't listen to you) { block their access to internet so you don't get banned } }

_________________