I joined one January, several years ago. The folks who back GetNetWise.org certainly think so. GetNetWise is a coalition of Internet companies that have banded together to promote online safety. You'll find some pretty delightful places to visit, including the Kennedy Center StoryTimeOnline where you can listen to new and classic tales via RealAudio.
Some people online pretend to be someone else.
You may be surprised to see what you can learn from your kids. Have them show you sites that they like and help you discover ones that may benefit you. Ask your kids to use the Internet to help you plan a family vacation or outing or research a good investment or perhaps a good charity to donate to. Not only do you have to worry about people who say they're kids but really aren't, you also have to be concerned about people who say they are spreading truth but are really propagating opinions or, in some cases, lies. It's not only a safety issue, it's also a matter of understanding what is and isn't reliable information.