Government vehicles equipped with license-plate snapping camera systems
are rolling through cities like Boston, Chicago, Los Angeles and
Toronto, looking for scofflaws. The AutoFind License Plate Recognition
system reportedly feeds license plate information to a central database
to monitor not only the presence of vehicles, but how long they remain
parked and whether the drivers are "persons of interest."

RFID could make such invasive spy systems even more powerful. Imagine if
an RFID counterpart to the camera system could roam the streets sniffing
out RFID-enabled license plates and vehicle registration stickers? It
would work in the dark, in the rain, or at 65 miles per hour. Worse,
such a system could be turned to scan the spychipped drivers licenses
tucked in the purses and wallets of passersby