When we had to track teenagers' nightclubbing whereabouts
(they're adults now), we did the following:
1) made sure we'd written down their mobile phone-numbers (obviously)
2) remembered their names/addresses (obviously)
3) told them to leave their mobiles switched ON all the time (they'd
have done that anyway to keep up with Social Media)
4) Sent them a text every hour on the hour and they'd have to
reply 'OK'. We'd reimburse them the money for the texts
(nice little earner if you're on a plan...). Side-effect: it
boosted their self-esteem
(wow, getting messages all the time - she must be popular).
Was that asking too much?
Fast forward to our current lockdown and the way to handle self-quarantine:
1) as above
2) as above
3) as above
4) get info from cellphone-towers to check which one they're logged in.
If, for example, someone is in self-quarantine at an Auckland campground
and all of a sudden's logged into the Gisborne cell-tower, that would be an
indication that they're elsewhere - or that the phone had been stolen.
Note that in the case of traffic accidents police already get the info from
cell-towers, so they can determine if the driver - according to their
phone - was in the area, logged on and texting. Piece of cake for them,
according to TVNZ.
BTW, there is no need for name-matching: the rental-car companies do
so the user's name could stay anonymous - until police very kindly
ask/beg cap in hand
for it to be released.
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