Why the MANDITORY game brand blast?

All games can be pretty easily identified by their sound, not just the intros, so the only logical solution will be turning off all the sound while playing as that will hide all audible clues like intro's, sims speaking Simlish, shooting etc.

Alternatively, if a child says "WHY DO I HAVE TO CLEAN MY ROOM WHEN YOU'RE PLAYING GAMES?" you can say "Because I've already cleaned mine, I payed for the Xbox and it's my turn".

As a last resort there's always a headset.

All in all, is it really EA's job to help parents hide their gaming from their children - I don't think it is.