I have deleted their contributions, but they all have a message in their user_talk which was added by the extension:new_user_message when they signed up, but since that is not their contributions technically, would it caused a problem?
In other words, must I removed the talk message from their user_talk page before I proceed? But there's no easy way to do this, unlike their contributions which was easily removed with Special:Nuke.
The maintenance script: RemoveUnsedAccount.php doesn't seem to work, maybe because of the welcome talk message in them.
Please advise.
This trouble concerns MW_1_35