Hi, depending on your internet provider, you should be able to block anysite that for example allows over 18 input.
You will need to email your ISP and they will tell or show you how do do it. Hope this help...good luck
seriously ... I'm not sure you can ... I think it's true to say that every school has a kid who know how to get round any filter you can name
my 5 year old neffy calmly asked his mum for her paypal password to pay for a shedload of thomas tte stuff from e-bay - and that's far better han the other options
If you are using Internet Explorer try to do theses steps:
> Open Internet Explorer
> Click on Tools
> Go to Internet Options
> Go to security Tab
> Now click "Restricted sites"
> Here you can add those sites that you do not want to open
> Click Apply and OK.