Some of the content to be found on the Net vastly expands one's ability to learn good and useful things, from who are ancestors were to how to feed a desert tortoise. And just as people can create good, there are bad things and useless things and dangerous things to be found on the Net, just as there are bad, useless and dangerous people living on the planet. For the Net is simply an extension of people. And therefore the Net can be terribly frightened to those accustomed to being able to control access to information, whether good or bad. But think of the Net as being just another form of Fire.
Fire is an incredibly useful thing, if used properly.
And it is deadly if not. Humans discovered Fire a very long time ago. And probably realized very quickly that Fire was both good and bad, depending on how it was used. Many were probably afraid of Fire and wanted its use to be stopped out of fear that they could be harmed. But we realized that the benefits of Fire outweighed its danger, and we learned that at a very early age we must teach our children about the dangers of misuse of Fire.