[physix]

A colleague upgraded the production database for a securities financing settlement system on a Friday evening by accident 20 years ago.

We were devs with root access to production and no network segregation. He wanted to upgrade his dev environment, but chose the wrong resource file.

He was lucky it was a Friday, because it took us the whole weekend working round the clock to get the system and the data to a consistent state by start of trading.

We called him The Dark Destroyer thereafter.

So I would add network segregation to the mix of good ideas for production ops.