Edward Z. Yang wrote:
Penguin is an article
Phoenix is an article
Ice Bird is a history-less redirect to Penguin
Fire Bird is a history-less redirect to Phoenix
You can move Penguin to Ice Bird but not to Fire Bird. Phoenix is our
"Article C"
I used to be completely paranoid about vandals using page moves to
shuffle article titles, by repeatedly swapping titles via a temporary
page. That is, until I realised this attack was already protected
against, using the feature you describe above.
And in a previous message:
I'm telling you, one of these days a vandal is
going to realize that
Page moves require little work to be done but can cause massive damage
that requires lots of work to fix, and then create multiple puppet
accounts and capitilize on this behavior.
This has already happened several times, we've seen this scenario played
out to the fullest extent. We've implemented a few features to deal with
it, such as "undo" links in RC and checks for "newbies" attempting to
move pages. Allowing users to move over arbitrary redirects would open
us up to truly irreversible attacks, rather than just attacks reversible
only by admins.
-- Tim Starling