The great power of the internet is the vast resources of information available and the ease and speed of obtaining that information. But with this great power comes risks. The internet is not owned or monitored by any entity, but an open, international forum of information sharing. Anyone can access or publish information on the internet. There is no restrictions on marketing products such as alcohol and tobacco.
Children also have access to games with excessive violence and gender stereotypes.
Even requests for personal information for contests, surveys, etc., can be used in unauthorized ways. Think carefully before revealing any personal information such as age, marital status, or financial information. Yet keeping your children off the internet simply to protect them from the dangers is not an appropriate response. The fact that the library may contain books you would not want your child to read would probably not keep you from allowing your child to use the library. Most parents are eager to see their children excited about learning and reading, and don't want to discourage that behavior.