Community of Sexsoundlovers

I am aware that if one is caught peering at another/others, through the keyhole/with binoculars/hanging by one's fingernails to the window/balcony, without their knowledge or permission, one would be branded and charged with being a "Peeping Tom".
However, if one is in a public space, like an hotel/guest house, or even in someone's house, and that person(s) are having sex and making loud enough sounds to be heard by passersby in the corridor/passageway, or even the sidewalk, and one stops to listen, can one be branded as a "Listening Tom" and charged with anything? Is the act of recording these sounds in those instances illegal/criminal?

This is an international community so what is legal one place may not be someplace else. Even within the same country, different cities or states may have different laws. If you got caught I doubt saying the internet says it is legal would get you very far. Not to mention, if you are doing something the powers that be don't agree with, but legal, they can find other ways to screw with you. I would be discrete, and have a plausible excuse for anything you do.