I don't have the link at hand but a few years ago (so I'm probably wrong about the details) I think a Debian developer was annoyed by the misuse of his personal

I don't have the link at hand but a few years ago (so I'm probably wrong about the details) I think a Debian developer was annoyed by the misuse of his personal repository that he modified his deb packages to change the user desktop background, mostly to demonstrate that installing random unknown packages from the Interweb could be dangerous. I recall that episode made some noise at the time...