Putting this up because I've gotten a few messages lately when family was on the Xbox, and I don't want you guys to think I don't care.
9 times out of 10 if my GT is on before 2pm central time, it's my family. If Netflix/windows media center/movie is shown active it's again most likely family. I have the notifications off when movies are playing so it doesn't bother them.
So again, I'm on primarily from 1-2pm central time and on.