This one really seems like a no-brainer, but if it didn't happen, then Facebook probably wouldn't feel the need to list it in the No. 1 slot on its list of things you shouldn't share. Even sharing the password with a friend so he or she can log on and check something for you can be a risk. This is especially true with couples who feel like there's enough trust to share these kinds of things. Here's another scenario for you: You give your boyfriend your Facebook password because he wants to help you upload some vacation photos. A couple of months later, the relationship sours, he turns into a not-so-nice guy and then there's a person out there who doesn't like you and has your login information. Time to cancel your account and get a new one. If you'd have kept that information private to begin with, you could simply move on with your life. Now you have a compromised profile, and if you link to other sites or profiles, all that information is at risk as well. Keep your password to yourself, no matter what, and you never have to worry about it.