Tilt/Intrusion vs. Sentry mode
It should be possible to turn off TILT/Intrusion WITHOUT having to turn off Sentry mode at the same time. Example: Home parking at night - a bug sets off the alarm, waking up the neighbors. To avoid that You would have to have sentry mode OFF all night - missing the chance to record possible vandalism at the same time.
Another example is on a ferry, where the TILT often makes the alarm start, so to avoid that, again You have to turn Sentry mode off, which You do not really want, on those tight parking spaces on a ferry.