Online scams continue to be a big problem. With the recession, there has been a big increase in fraudulent job ads. Recently, Google has filed a lawsuit against spammers using the company's logo in conjunction with false job ads. It is important to make sure that you are dealing with reputable online vendors who will protect your information.
To help combat this growing problem, lifehacker.com has published The Complete Guide to Avoiding Online Scams. This excellent article not only covers basic tips (such as making sure you have a strong password), but also excellent tips as related to Web 2.0 sites (never give out your email password to see what friends are using a particular Web 2.0 service).
The Internet is a great tool, but you do need to be careful. Remember, use common sense while on the Internet; if something looks too good to be true, it probably is.