Not sure about the systems you maintain, but mine page for false positives all the time. They're annoying, sometimes they wake me up, but in general they're not

Not sure about the systems you maintain, but mine page for false positives all the time. They're annoying, sometimes they wake me up, but in general they're not a big deal. A false positive from a medical test is much more costly, both in money for a doctor (or doctor's staff member's) time, and anxiety for the patient. That said, your brother's case makes some sense. It's targeted, and I imagine the action you want to take after getting an alert would be pretty well defined.