Hello Piotr, 
   I believe that in Chinese Wikipedia, "blocked indefinitely" is a user category called Wikipedians that are blocked indefinitely "被永久封禁的維基人"  http://zh.wikipedia.org/wiki/Category:%E8%A2%AB%E6%B0%B8%E4%B9%85%E5%B0%81%E7%A6%81%E7%9A%84%E7%B6%AD%E5%9F%BA%E4%BA%BA
   Its equivalent Wikidata table has the following pages in other language versions:
http://www.wikidata.org/wiki/Q4616402#sitelinks-wikipedia
Language Code Linked article
English enwiki Category:Blocked historical users
italiano itwiki Categoria:Wikipedia:Cloni sospetti
latviešu lvwiki Kategorija:Uz nenoteiktu laiku nobloķētie lietotāji
slovenčina skwiki Kategória:Wikipédia:Natrvalo zablokovaní používatelia
česky cswiki Kategorie:Wikipedie:Natrvalo zablokovaní uživatelé
български bgwiki Категория:Блокирани неприемливи потребителски имена
олык марий mhrwiki Категорий:Википедий:Йӧн петырыме
українська ukwiki Категорія:Безстроково заблоковані користувачі
中文 zhwiki Category:被永久封禁的維基人
日本語 jawiki Category:無期限ブロックを受けたユーザー

   I hope that it helps.
Best,
han-teng liao



2013/9/29 Piotr Konieczny <piokon@post.pl>
Hi everyone,

Another question: do we have an estimate of a vandal population?

I also asked this at https://en.wikipedia.org/wiki/Wikipedia:Village_pump_%28technical%29#How_many_editors_are_blocked_indefinitely.3F but so far no good estimates have been provided.

--
Piotr Konieczny, PhD
http://hanyang.academia.edu/PiotrKonieczny
http://scholar.google.com/citations?user=gdV8_AEAAAAJ
http://en.wikipedia.org/wiki/User:Piotrus


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