A quick google search brings this up wrt Querulous Litigants, looks like it's a US site but seems relevant...apologies for bold fail!
"Querulous behavior, according to Mullen and Lester, involves a “totally disproportionate investment of time and resources in grievances that grow steadily from the mundane to the grandiose.” Resolutions not only require “an apology, reparation, and/or compensation but retribution and personal vindication” – objectives beyond what courts can bestow. As Western society and organizations have expanded the opportunities and avenues for individuals to present or appeal grievances and pursue justice, a side effect may be the enabling of abuse. In our experience these individuals often reveal grand fantasies of their ultimate vindication unveiled dramatically at the highest judicial levels, accompanied by criminal punishment and public humiliation of their wrong doers. It can start with a relatively minor issue. Being bypassed for a promotion can eventually lead to a bizarre, life-engrossing campaign to uncover and bring down “global conspiracies.”
In meetings the querulous may insist on taking notes or recording the session. Such individuals do not collaborate well with others, and will dismiss lawyers, union representatives, and other helpers. They may even call for the disbarring of attorneys and the dismissal or prosecution of other officials. In the courtroom they may make unruly remarks to the judge, inviting sanctions. Some may show a keen awareness of the lines not to cross so as to avoid contempt charges or jail terms"