Thread:Brandon Rhea/@comment-4136498-20120930185020/@comment-5209426-20121001175601

The inactive masthead tag is a non-Wikia feature. You'll have to install the relevant JavaScript into the Wiki to activate it, you can find it on the Dev Wikia.

There are actually two scripts:
 * InactiveUsers &mdash; original script by Pecoes; or
 * UserTags &mdash; newer script by me, does Inactive and a heap more stuff as well