Forked from {T246368}
While there are gadgets and alike for doing this, MediaWiki should have a way to "mass block" a list of users. This could then be tied into new users log/users lists, allowing checkbox selection and moving to the mass block page to block them all in one go
Advanced features like building lists with regex/wildcards and stuff would be nice, but could come later
https://it.wikipedia.org/wiki/MediaWiki:Gadget-Massblock.js looks like
{F31649172}
It should be core functionality, not a gadget that potentially need separate maintenance. I don't know if it necessarily needs to be a separate form (and a separate right?), because a multi select option (or multi line textbox) on Special:Block could suffice too. The changes to the code is then just to iterate over the list of users, rather than just working on one...