I haven’t heard of an actual way to track if someone is or isn’t onsite. Many sites have doors that don’t require you to badge out. So it seems like the only legit tracking is if someone doesn’t come in at all, which really again… if you can leave without badging out, you can also come through those same doors.
Last week I saw someone not have their badge at a back door and someone else swiped their badge and both walked in. Badge tracking is not a good enough tracking system to mass fire people.
The threat isn’t well enough thought out. Which is how most things are with the current leadership. There are very few leaders capable of thinking of more than one outcome.