I don't think the filtering options you link to are realistic for public schools. They amount to configuring your browser to not show images, configure a skin which uses a blacklist of 'limited utility', or use a 3rd party proxy that gets no help from Wikipedia.

> Logged-in users can use personal cascading style sheets to display of images selectively (explained below).

> By filtering content locally, either by configuring their web browser (including the possibility to display no images at all), or by setting up a proxy (such as Privoxy) (explained below).

edit: added limited blacklist option

By that logic installing and configuring all other computer systems will be equally unrealistic.

What does wikipedians against censorship say about him? It seems to argue against censorship.

There's a subset of wikipedia editors who seem to be constitutionally unable to differentiate between "censorship" and "discretion". Try this one on:

"Hi, this article that doesn't seem to have anything to do with nudity has a picture of a naked woman at the top, where it is particularly likely to be problematic for people browsing at work. Here is a non-nude picture that illustrates the topic of the article equally well. Any objections to changing it?"

If you cry censorship, you do not know what that word means.

Here's the real discussion.

http://en.wikipedia.org/wiki/Talk:Pregnancy/Archive_5#Not_Sa...

Additionally, removing offensive images is directly against Wikipedia's goal of recording the sum of all human knowledge. Indecent things and ideas are important to document too.