:Disclaimers: I'm hardly an expert on php; the sum total of my experience working with SQL or any other relational database is a two-hour introduction ten years ago; and my knowledge of Mediawiki source is limited to about fifteen minutes of grepping the source the last time this came up on WP:AN (it should be in the general archive).  Furthermore, I don't know why it was disabled, though I can think of at least one very good reason: it encourages vandals to create a great deal of throwaway user names. 

 :I'm also on wikibreak for the forseeable future; I'm much more likely to see (and respond to) email than talk messages. 

 :That said: 

 :The feature should be able to be turned on without fuss by a developer with shell access setting the $wgOnlySysopMayMove configuration variable (note that it doesn't do what it says it does).  This will prevent page moves by any user who is one of the 1% of most recently-created user names and is not flagged sysop or bot. 

 :It should be trivial to alter the above requirements (they're in includes/User.php, function User::isNewbie()) such that a different percentage of user names is prevented, or indeed that only sysops are able to move; however, there are no configuration variables to control this, so it might be disallowed depending on development policy. 

 :Making a certain number of edits be a requirement should also be feasible, though it would be less trivial.  The query could be cannibalized from Kate's tool, if nowhere else. —