日々更新mobilerA8（Yahoo!ニュースを毎日ウォッチ）

結局、高度な判断をするにはホワイトリスト（観てもよいものを選別する）式しかないのでは？

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フィルターは機械的に処理するのでどうしても限界がある。
簡単な解決はフィルターで除外リストを簡単に追加、あるいは、パッケージで除外リストを提供することだろう。
どこまで行っても、結局、人間の判断になる。
機械で全て処理することも多分可能だが、人が認証するような除外ＵＲＬリストを作るほうが現実的だろう。
BBCより。
http://www.bbc.co.uk/news/uk-25430582
Pornography filters used by major internet service providers are blocking websites offering sex education and advice on sexual health and porn addiction, the BBC has learned.

The four major internet companies have started to roll out so-called porn filters to their users.

Last month, Prime Minister David Cameron welcomed "family-friendly" filters and said they were important to stop children "stumbling across hardcore legal pornography".

But BBC's Newsnight has discovered all the major ISPs that have launched full default filters are also failing to block hardcore porn-hosting sites.

All new customers will be prompted to decide whether to opt in or out, while existing customers of major ISPs will be presented with an "unavoidable choice" about whether to sign up.
Parental controls set up screen BT launched a porn filter for users earlier this week

Among the sites TalkTalk blocked as "pornographic" was BishUK.com, an award-winning British sex education site, which receives more than a million visits each year.

TalkTalk also lists Edinburgh Women's Rape and Sexual Abuse Centre website as "pornographic."

The company also blocked a programme ran by sex education experts, taught to 81,000 American children that has been in development for more than 20 years.

TalkTalk's filter is endorsed by Mr Cameron but it failed to block 7% of the 68 pornographic websites tested by Newsnight.

Sky's filter fared much better, blocking 99% of sites, but it did block six porn-addiction sites.
Advertising campaign

BT blocked sites including Sexual Health Scotland, Doncaster Domestic Abuse Helpline, and Reducing The Risk, a site which tackles domestic abuse.

In the new year the four major ISPs will fund a £25m advertising campaign to explain the filters and other aspects of children's safety online.

The filters were brought in following increased parental awareness of the ease with which children can access pornography online.

Victoria Shotbolt, chief executive of the Parent Zone, said: "It's great that the four ISPs have got together and are doing an awareness-raising campaign. But it isn't even starting to be enough.

"We're focusing so heavily on filters and all of the ISPs having them and public wi-fi having filters that the message getting through to parents is that those filters will do the job."

Justin Hancock runs BishUK and was not aware his site was being blocked by some filters until he was alerted by Newsnight.

He said: "It's really frustrating because I'm trying to provide a sex education site for young people and it's hard enough directing young people to good quality information on the internet.

Over-blocking problem

"They might fix my site in the short-term but what about all the other sites that are out there for young people, not just sex education sites… who are TalkTalk to say what is allowed and isn't?"

・・・まあ、除外リストなんて作ればよいのであって、ポルノフィルターが教育的なものも排除するというのははっきりいってお粗末である。