Half-Life 2 called "School Shooter: North American Tour 2012" has been pulled from its hosting site, ModDB, after picking up some attention for its controversial nature. The mod allowed the player to explore a school-like environment in a first-person shooter context, with the option of attacking various unarmed NPCs. ModDB has posted a short statement about why it pulled the code, saying that although it feels "people should have the right to be creative and share what they want on a community / developer run site," the "confusion and hate" surrounding the project led to the removal.
As you can see from a video of the mod posted on YouTube, there's another reason people don't need to share it around, and that's because it's just not very well made. The "Boring" effects are pulled from Bulletstorm's "Duty Calls" parody, but they fit this one just fine, too.