Are you using WIFI at home? if you do you must read my son's book about WIFI pitfalls. He explains the security issues with wifi and shows you how you can get access to anyones computer and stealing passwords by directing all the traffic to your computer without the victim noticing. He says it takes him 20 seconds to take paypal's password.
His book will be released next week, I will keep you updated, it is called "WIFI Penetration Testing" and it is a must read to protect your privacy.
Mahmood