Watch out, houseboat dwellers and nearby shore residents: sniffing hits human-powered water vehicles!: In my hometown of Seattle, some intrepid souls pack their gear in plastic bags and kayak around Lake Union, a mid point in the connected bodies of water from Elliot Bay through to Lake Washington. Lake Union is home to high tech and biomed companies around the periphery and houseboats and marinas directly on it. The lake is a little dodgy--I wouldn't want to swim in it--but it's a pretty view from the shore or out in it.
Warkayaking is the latest variant in the war- prefix series of sniffing Wi-Fi signals from various places or indicating the presence of Wi-Fi through various means. There's been warflying, wardriving, warchalking, and even warwalking.