Nice idea Natacha,
The WMF is giving a free pilot course on harrassement to several wikimedians from different projects (in English) see here 1. Notes on the course in French are available here https://fr.wikipedia.org/wiki/Projet:Lutte_contre_le_harc%C3%A8lement/Formations_WMF
I am looking for cases of harassment that finished well according to all parties involved to make a pool of best practices for community members.
If any of you has such a case in mind please write to me (please dont take current cases).
Nattes à chat