Wikimedia Bugzilla is closed!

At present oversight provides a way to handle serious defamation and personal information in page revisions. However there is no way to remove it in logs. Any user (and especially administrators) can create a log entry and there is no way to handle it "within the system" if by mistake this summary is defamatory. 

There needs to be, even if it's just a way for an oversighter to have 2 fields, "original reason" and "oversighted reason" so the log integrity is intact.

Example (relates to a banned user discussed at length, but this does not make it any less problematic):

http://en.wikipedia.org/w/index.php?title=Special%3ALog&type=block&user=&page=User%3ARoman+Czyborra