Yeah, wireshark can definitely sniff the network, but he was trying to point out that for $57 you can make ten of these and plug it in to empty outlets around the city, hotels, cafes, etc. and it would record data and send it back to a server....
Now imagine the government placed these nodes everywhere... they would basically have a fixed GPS on you.
Now imagine the government placed these nodes everywhere... they would basically have a fixed GPS on you.