Aude wrote:
" Developping some kind of working arrangement with the school involved would make more sense." - don't think this is practical given the volume of vandalism coming from so many different school IPs, compared to our current level of resources. ( e.g. Wikipedians) We can always allow students to create accounts, so the impact on good users is minimized.
http://en.wikipedia.org/wiki/User_talk:156.3.138.6 - just blocked this one, after they started vandalizing immediately after coming off of a block. I looked at a sample of edits from this IP address and don't see any positive contributions. Just vandalism. There is a large {{schoolblock}} template at the top that explains that users can create accounts and edit with those.
Unless someone wants and can take the time to contact this school and the numerous others, I don't see any other choice at this point.
As long as there is no attempt to deal with the school administrations the problem will never be solved. All we'll have is short term paper-overs. If these schools had been dealt with correctly from the beginning the problem now would not seem so overwhelming.
Ec