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.
Version: unspecified
Severity: enhancement