Thread:Jr Mime/@comment-26978548-20170814220406/@comment-30311333-20170814223955

That's to solve the vandalism situation that you're reporting, if the vandalism is just in one wiki, the user will be blocked in that wiki only, but if there is cross wiki vandalism, the vandal will be blocked in all the wikis where he is causing troubles or globally according to the situation. There in the report page you can find the option to report cross wiki vandalism.