I'm pleased that the reaction in this thread is generally with understanding towards the developer. We've all had facepalm moments like this, and probably not a

I'm pleased that the reaction in this thread is generally with understanding towards the developer. We've all had facepalm moments like this, and probably not as publicly. But I don't think Bad Thing Prevention is necessarily to be avoided. Undo buttons are sweet, but not everything can be undone. An anecdote: During the first month of my first job in finance I accidentally deleted a few mappings in a database which put the entire company at risk to the tune of about $45million. Complete bone-head move, I was new to the game. It all turned out fine and I got off with a slap on the wrist, but my manager was flogged. When markets are involved, something like that has no undo button. Instead, we put some proper controls in place (tests, mostly) to make sure said mappings were always logically consistent. As far as I know, that brand of problem has not occurred in the 6 years since.