said by devicenull 
:[...]
The only way an ISP can provide a totally safe approach is with some sort of walled garden. Don't allow anyone onto the "public" internet, only trusted ISP sites. I somehow doubt this is a good idea.
[...]
Actually, that may not be a bad idea. New and inexperienced users could be confined to their ISP's portal. Only after demonstrating some level of competence would they be allowed out onto the internet. They could also have to demonstrate that their computer met some level of security.
