Last modified: 2011-03-13 18:05:50 UTC
There should be some search feature in [[Special:Listusers]] which displays all users who have a certain pattern in their names. For example, searching for "vandal" will result in displaying all users who have the word "vandal" in their usernames (either at the beggining, middle or end). This will make it very easy to find inappropriate usernames. The current filtering feature lists only usernames "staring" with a certain pattern.
It's very easy to provide a toolserver tool for this purpose (one SQL query will be enough). Ask people on #wikimedia-toolserver on [[freenode]].
For performance reasons, we can't allow any old LIKE expressions. The reason for this is that it would require a full table scan, whereas the current method can use an index.