Wouldn't your approach have the unintended consequence of making other interviewers pick up your slack by increasing their false positive rate or by weighing other less measurable qualities? aka going by ivy or "feeder" schools?

It seems like your over-reaction is in fact counter productive and may make the whole thing less meritocratic.

My big assumption here is that FB and other places need to hit some numbers every year in terms of new hires especially with FBs no promotion by X years then you're out process.