I think something like this has happened to just about every developer I know. I remember when I was getting ready to launch a revamped version of a service I w

I think something like this has happened to just about every developer I know. I remember when I was getting ready to launch a revamped version of a service I was working on, the night before launch, when I was migrating all the users from the old version to the new, I accidentally left emails turned on, and fired off about 9,000 welcome emails (which were only supposed to go out to new members) before realizing what was going on. The next day was not so happy. Even with a follow-up email explaining the error, a few users decided to leave the service because of that (harmless) mistake.