Wi-fi symbols

[MsBadely]

I remember a while ago hearing about symbols that people draw on buildings where wi-fi internet access is 'leaking' out of the building - to let people with PDAs, laptops, etc. know that they can connect to the internet there for nowt.

These symbols or the practice of drawing them had a name - can anyone remember what it was.

And has anyone actually seen one?

[Ralph]

Warchalking

I've never actually seen one, but apparently they're more likely to be used as advertising these days rather than for any nefarious purpose.

[MsBadely]

Thank you!