I need a PAL player to test, I guess your using NTSC.
Yes. Recommend, No. I mean really, we're flagged. You can keep it offline a year and plug it in and online and be banned instantly. I would be more concerned with them slipping something else in that fixes this "loophole". BUT, if you clear cache after you return to the dashboard I don't see how it could execute and you'd still be ok. All that will change once the fall update launches because a fix can be included in it. Probably safer now than later, go get you some XP

Hmmm, well I am flagged and your right maybe I should just go on and get some more XP on MW3