One thing that will always stick in my mind is one time I worked at a national Internet service provider.

The log disk was full or something. That's not the shameful part though. What followed is a mass email saying everyone needs to update their connection string from bla bla bla 1 dot foo dot bar to bla bla bla 2 dot foo dot bar

This was inexcusable to me. I mean this is an Internet service provider. If we can't even figure out DNS, we should shut down the whole business and go home.