You get what you pay for (Score 1)

his requires a multi-pronged approach: Put the computer in a public place, especially if it has a webcam. Do yourself and your family a favour and pay for something that will at least prevent the worst of the Internet from entering your living room because when you pay, you have a team of developers who are updating the software as and when it's required and you have a level of accountability if something goes wrong. The maintain the list, the patches, the updates etc. You have a level of control too, you can add additional sites to your block list if need be. Log everything. Review the security logs, history, favourites etc. Do NOT allow them to have administrative access to the local workstation. Have a separate administrative account with a tough to guess password that you keep locked up in a safe area of your house or at work or on your mobile phone (you get the idea). Talk to your children about online safety as you would any other kind of safety. Tell them about online predators, tell them about grooming techniques and how to handle them. There are so many resources out there on how to handle this parenting issue. And Most importantly, ignore the advice of the childless. As teenagers think they know everything until they realise they don't, the childless think in much the same way, that they know how best to raise children. A parent has the advantage of having once been childless and smug, as well as being a parent. There's no lesson as effective as experience.