I remember a certain prank that amuses me till today....

Just add some devices to monitoring and the notification queue of the build chain / ... ...and wait patiently.

I still cry tears remembering an manager screaming what the hell "the poop train clogged the drain" means and why this is a critical system failure.

(Notice: next time check the mailing aliases of mailing aliases)

Although I can only recommend this if you know your team well. In my case we had a whole lot of fun after I got my head chewed off. XD (got an earful, but in the end he laughed his ass off)