I implemented a policy to only use the most bland test data while testing my apps, and it's saved me a few times when, for whatever reason, there was an acciden

I implemented a policy to only use the most bland test data while testing my apps, and it's saved me a few times when, for whatever reason, there was an accidental leakage of test data through to the client (whether it sneaks into a slideshow, or a test email is accidentally sent to a production email address, or...). I've been around development long enough to know that at some point, this type of leakage WILL occur, and it will be embarrassing when a customer sees a dummy entry for "Dickhead Buttface" or similar. While it's excruciating and boring to use plain test data, you'll be glad you did it when you have an accidental leak between environments.