So here's the problem: You have tenants in apartments. Some of them play loud music all night long. Now this new tenant complains about the noise. The rest are either used to it or don't mind listening to the music or they too play loud music to drown out what the others are playing. The tenant demands that the landlord should take action or else . . . What should the landlord do? Get out there and demand that no one plays music? Supposing they all threaten to leave? Would it be better to lose one tenant in such a case?