Reddit user melanieeritchie "had a friend" that was kept up all night by his neighbors having sex in the apartment next door. As retribution, he made an audio tape of the incident and posted it on Soundcloud. He then left this message on their door to let them know what he'd done.
Do not go to the address posted above, it has since been taken down. Right now it is posted by Soundcloud user nebber, follow this link to listen:
Nothing special. It's actually about as annoying as being kept up all night with that going on. What is funny is that the same guy made a dubstep remix of the track. Listen here:
Of all the annoying things about apartment living this has to be the worst. It's good to see someone getting some sort of cathartic release from being forced to listen to a neighbor's cathartic release.
He should have just done what this guy does when his neighbors' go at it. He sets up challenges to amuse himself and viewers, all of which has to be done in the time it takes for the neighbors to finish.