Since Mike did a thread cleanup, you will need to ask him GT2L, he said that simply disabling CMGuardian was no longer enough, he said Sprint did something that made a secondary way to make sure stealth tethering be disabled after each reset, I guess it took him quite a bit of time to figure it out to make sure it was 100% disabled...
Ill definitely wait until you figure out what he figured out, I definitely use my phone as a modem