Scams like pop up scam auctions are hard to track,
because
they open up and close very quickly.
The best way is to at least take photos as a bystander of
any events you suspect to be a scam with the app, and
fill
in any details you think will help. E.g. Van markings,
etc...
Your report
might not be big, but if enough people have
enough information, then when a victim complains, you
can act on it quickly.
This will be very useful, if real time searches on last
known
reports that matches what you said can be done on the
fly.
So if the face matches the scammer, you could in fact
perhaps even call the cops on the spot while the auction
is
occurring.
So 3 tech you will need for this, face matching, and
licence
plate reader, correlation algo for similar reports.
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Doesn't have to be just for scams. Could be for anything
btw.
Preferably the app can also call for nearby taser drones,
if a physical cop is not nearby.