Cyberbullying (also called griefing) is the act of harassing someone online. It is illegal to communicate repeatedly with someone if your communication causes them to fear for their own safety or the safety of others. Always speak to a responsible adult if you are uncomfortable with any conversations occurring online. You can block the person sending the harassing messages using the block options that come in many e-mail and instant messaging programs. And your parents can help you save any harassing e-mail messages and forward them to your e-mail service provider. Most providers have appropriate-use policies that restrict users from harassing others over the Internet. If the harassment consists of comments posted on a Web site, you can contact your Internet service provider (ISP) and ask for help locating the ISP hosting the site. You can then contact the ISP and bring the offensive comments to their attention. You can also contact your local police department.