Airbnb illegal audio monitoring?

Me and my partner decided on Airbnb for our trip to Barcelona. We found one  and booked it. Generally the flat was ok, However there was a warning on the kitchen door, stating they are listening for noise 24 hours a day and will cancel bookings if there is loud noise. Looking around I think…[...]

https://cubicgarden.com/2018/09/11/airbnb-illegal-audio-monitoring/