It is important to understand proper etiquette when interacting online-"netiquette." This section has useful tips to help you understand what actions may be deemed appropriate, and which may be annoying.
Snopes.com is a great site to check on whether something you receive in e-mail, Facebook or other social networking sites is true, or a hoax. Before passing anything on to others, take a moment to check validity! Once you access the site, you can search for the topic in question. To test it out, try searching "sick child" to see examples.