Delete or disable user in mediawiki

How can i disable or delete an user in mediawiki? I can delete the records from the db but i am not sure if this would affect anything else in the wiki. Any suggestions would be welcome

Thanks Prady

How do I remove a user from Wikipedia?

Select Start > Settings > Accounts > Family & other users. Under Other users, select the flyout for the account you want to remove. Next to Account and data, select Remove.

How do I create a group in MediaWiki?

Creating a new group and assigning permissions to itMediaWiki:Group-<group-name> (content: Name of the group ) MediaWiki:Group-<group-name>-member (content: Name of a member of the group )

There's a special page that Admin users can see, /Special:BlockIP. Block them there.

You can also get to it from the Special Pages page, /Special:SpecialPages.