Your personal information has become big business on the Web. Most online companies count each registered user's personal info as a valuable asset. If you're registered somewhere, you have a price on your head. But there are ways around that. Beyond the creepy feeling of knowing your personal information is being used as a commodity, registration is annoying. You can choose not to register, but sometimes that means not getting the content you want, say, at the New York Times Web site. Anonymous registration A site called Bugmenot.com uses a community approach. People are encouraged to submit their logins at...