When ikiwiki is being used for issue tracking, it would be convenient to have a way to close a bug from a comment, rather than editing the bug report page in a wiki-manner.
So, some way to set a tag from a comment, such that it applies to the parent page.
Turning on allowdirectives may make that work (I have not tried), but it's probably too heavyweight/intrusive/possible a security issue.
Maybe extend the comment directive with a field to set/unset tags? --Joey