It might be a little passive aggressive but here's a hilarious way to stop your neighbors from having cat-howling, bunny-bumping, orgasmic tongue screaming sex: record their moans and post the audio file to Soundcloud for all the Internet to hear.
Hey, I'm not against people having consensual sex. And I'm totally for dirty talk and moaning and scratching and pulling and any gerund you can think of. But when the sexy fun time lasts a little too long and is a little too loud that you're keeping all your neighbors up in every neighboring apartment? Well buddy, it's time to shut the windows! Or maybe not perform too well?