Don't share your password with anyone. People you talk to online are strangers. Follow all the rules you know about strangers. Don't meet with them in person without your parents' permission. Some adults claim to be children.
Some girls say they are boys.
Some advertising is disguised as information. If an offer looks too good to be true, it may be a trick. Don't take words, pictures or sounds from a Web site without their permission and without giving them credit. Don't try to change someone's web site. Don't change the wallpaper or screen saver without asking.