Actually your console will record your playing, even offline, so don't use your xboxlive profile if you truly feel the need to play, because if you do, and when you reconnect your xbox to live, the date you first played H4 WILL show up on your profile and if anybody sees that and reports it, its just as bad as playing online early.
it happend to people when H3 came out.
if you really want to play, make a new non-xbox live profile.