More and more people are using social networking websites like Facebook,Google+,Twitter,and Plurk.Users post their personal information and share pictures and videos on these websites.This is a great way to stay in touch with their friends.However,there are some things that you have to watch out for.For one thing,while you are using these websites,never give your personal information to others.For another,do not post anything that you might be sorry about later.Visiting social networking websites can also be a waste of time.So remember to live in the real world.