[yjftsjthsd-h]

It is not hard to block in the trivial case; after that you're playing cat & mouse and dealing with false positives.

[_8j50]

Not in the trivial case. I meant most porn sites. All you have to do is use a reputation service and block uncategorized sites. Cisco OpenDNS actually offers a free DNS resolver that filters out most porn sites.

Also,surprised at the amount of responses on HN today that presume details....

[yjftsjthsd-h]

> use a reputation service and block uncategorized sites

This is what I was thinking of when I said "dealing with false positives"; those services make mistakes, and haven't hit every site.

[_8j50]

I don't think anyone aims for perfection but a 90%+ true blocks and less than 5% false would be a high standard.

[fapjacks]

Ah, the long tail tautology. Everything is easy in the trivial case.