Direct attack on your computer

Malicious users may be able to access files on your
computer, install spyware and other malicious programs, or take control of your
computer.
Wardriving
Wardriving is a specific kind of piggybacking. The broadcast range of a wireless access point
can make internet connections possible outside your home, even as far away as your street.
Savvy computer users know this, and some have made a hobby out of driving through cities and
neighborhoods with a wireless-equipped computer—sometimes with a powerful antenna—
searching for unsecured wireless networks. This practice is nicknamed “wardriving.” Wardrivers
often note the location of unsecured wireless networks and publish this information on web sites.
Malicious individuals wardrive to find a connection they can use to perpetrate illegal online
activity using your connection to mask their identities. They may also directly attack your
computer, as noted in the “Piggybacking” section above.
Unauthorized Computer Access
An unsecured wireless network combined with unsecured file sharing can spell disaster. Under
these conditions, a malicious user could access any directories and files you have allowed for
sharing.