Comment Kismet Does This Automatically (Score 5, Informative) 215
I wonder if they were using "off the shelf" open source tools to collect this information.
By default Kismet will log the pcap file, gps log, alerts, and network log in XML and plaintext.
http://www.kismetwireless.net/documentation.shtml
It is entirely possible that they were using off the shelf open source tools and this log type was simply not turned off in the configuration file.