It's very quick and easy to use a Satellite Finder to detect WiFI signals and more :
http://ki3u.byethost3.com/Radio-Physics ... iffer.html
Berj / KI3U
Using a Satellite Finder as a WiFi Sniffer
Re: Using a Satellite Finder as a WiFi Sniffer
If you mean possible with every satellite finder - my guess is probably.