Hmm...
Maybe we can flag certain links as containing nudity? Then, the link to
an actual image would not display, nor would the image load if a person
made a setting in their Preferences. Perhaps links to nudity could be
restricted so that they can only be referenced by a certain subdomain,
which schools could (probably) block fairly easily, regardless of a
person's preferences.
That's just an idea off the top of my head, I'm not sure it's any more
feasible than flagging certain articles to contain boilerplate text like
disclaimers.
This should be part of a general category scheme, not a specific solution
for images which are perceived as possibly offensive to a limited segment
of the population. What if someone finds articles about Christianity
offensive? Can they block them, too? Singling out the issue of sexually
explicit material is not neutral.
Regards,
Erik