If your environment permits it, you can use a sound system with different sounds to play when someone breaks the build. "D'oh!" from Homer Simpson, Darth Vader, sirens, all of them are just some examples of what you can do.
If you have access to developers machines, you can even create jokes like this sent to their desktops:
...obviously, with other context.
The best way to create these jokes is to use "Motivational Posts" with internal jokes they can understand. Every organization has internal jokes. You can use a motivational generator.
...again, this would be the "funny" approach. If you're into programming all these features, you can do a lot of stuff!
