This is old news :(
Bungie did nothing to stop it before Reach (and thus had an investment - ie you buying reach). So why would they even bother now?
A lot of the mods - like the speed increase & the super-craw speed - are done by packet modding. An easy fix would have been to cycle the CRC base sum, or at least double layered it.
But no more fixes - old product. Unless they are using a modded console they wont be able to detect the hack.