Discussion on the issue:
Reuest came at my talk page and Wikilabels has been created
Translation of Edit quality forms:
Trusted user groups are: bot, bureaucrat, sysop, rollbackers as per https://meta.wikimedia.org/w/index.php?title=User_talk%3A%E3%81%A8%E3%81%82%E3%82%8B%E7%99%BD%E3%81%84%E7%8C%AB&type=revision&diff=14952831&oldid=14945383
OK. After thinking about this one for a long time, I think that we should just substantially boost the sample size and then run the labeling campaign on the edits that "need review" (untrusted user, blocked or reverted).