I've been checking various websites I go on that are completely fine for kids. It's amazing what's getting blocked. One example according to that website is, TalkTalk blocks "http://www.writingexcuses.com/" It's a podcast that teaches story writing.
This is with the new government mandated opt-out censorship enabled (except AAISP, who don't offer it) - if that is disabled, most blocked sites would be accessible, except that sites with 'adult content' are still blocked by default on mobile networks (EE, O2, Three), which is an account setting with age verification to enable.
Except every ISP that isn't a mobile operator or a major UK wireline ISP (e.g. BT/TalkTalk/Sky/Virgin). Including Andrews and Arnold, but also including many smaller ISPs like Zen or IDnet or Xilo and others.
A&A have played a massive blinder on the media front, by saying that they aren't doing something that no one is legally requiring them to do (it would be interesting to see what they do if they were actually forced to, though). It's also worth pointing out that the mobile networks have had filters for years, because of Labour government pressure and not because of the "wall of Cameron" or whatever people are calling it.
I also like how the site says "checked on the main UK ISPs" and then includes A&A, which no one would ever say is a "main UK ISP". They're the nichest of the niche. They're an extremely good ISP (although you can get similar quality from others at a fraction of the price), but they're not a "main ISP".
I would guess that A&A have paid towards the ORG or are contributing something and that's why they're getting prominence.
Here we go. If a lot of harmless or potentially even useful material gets blocked, people who want to use that material will simply opt out or route round the blocking, hence making it pointless.
I kind of hope they overreach drastically for exactly that reason. It'll be a lot easier to get the filters dropped entirely if we can attack them with "useful website X is blocked for no good reason" over and over and over again, than if we have to argue using examples that many people would actually have a problem with.
OK, so I'll be keeping an eye on personal Web sites put up by teachers (of which there are many, a couple of examples[1], [2], neither blocked to my knowledge) that can be accessed from UKERNA provided College connections but become blocked by domestic connections.