Using a flashed drive online is very likely to get the xbox your using banned. End of. Anyone who gets their drive flashed, and uses it online understand this and therefor it's done at their own risk. Nobody can say its "100% untraceable" and "100% safe" I have flashed drive for offline and unflashed for online gaming
see i have two xbox's 1 flashed 1 legit but ive got a game on my tag and i only have to get 1 achievement which is to play a level online (Lego Star Wars:Complete Saga) and its killing me lol
It's a ***** Problem I got with mine, everytime I swap the leads over, the flashed one has 2005 as date lol
In my experience, going online with a flashed box will get you banned. All my games were properly stealthed, I never played early or anything, yet still managed to get banned. Just makes me think there is a way in which M$ can detect copied games (not convinced they can detect fw).