User blog comment:MisterWoodhouse/Social Activity, the 2010 Editor, and Unpausing Migrations/@comment-173.79.36.235-20201015200027/@comment-47011541-20201017032458

Well, yes, it is possible to be globally blocked. If you do in fact want to be globally blocked, you can request it by using Special:Contact.

I should mention that doing this won’t allow you to edit any wikis (unlike a local block, which only blocks you on a particular community or two).