FBI warns about wireless craze
Source: BBC
Well-meaning wireless activists have caught the attention of the US Federal Bureau of Investigation.
One of its agents has issued a warning about the popular practice of using chalk marks to show the location of wireless networks.
The marks, or "warchalks", are cropping up in cities and suburbs across the world.
The FBI is now telling companies that, if they see the chalk marks outside their offices, they should check the security of wireless networks and ensure they remain closed to outsiders.
