Could everyone *please* test their bugfixes locally before they commit them, backport them and have them deployed? A major deployment is not a good excuse to skip this evidently very useful practice.
If the site is completely down for everyone then maybe there is a case that you couldn't make it worse than it already is. But I've seen fatal errors converted to massive data loss so I'm completely convinced by that argument either. But most bug fixes do not have that level of urgency.
And just to make it clear that I am not singling anyone out with this post, I have seen at least four developers do this in the last two days.
-- Tim Starling