The entry on http://meta.wikimedia.org/wiki/MediaWiki_FAQ#How_do_I_delete_a_user_from_my_... says "MediaWiki does not support the deletion of user accounts. To prevent an account from being used, either scramble the password or set up an indefinite block on the account. Do not remove users from the user table in the mySQL database; this causes problems with other parts of the wiki due to the relational structure of the database."

My question: is the last sentence "Do no remove ..." still valid and important ?