Bloke I knew many years ago now, he's a student renting a terrace house. He's just moved in. He gets in from college, about tea-time, goes up to his room to get changed as he is going out for the evening. He puts a bit of music on while he gets changed. System is an Arcam alpha and wharfedale diamonds.

10 minutes later he is done, switches music off, is about to leave the house when there is a knock at the door. Opens door, it's the rozzers: 'The music's too loud, the neighbours have complained.'

He reckoned that given the response time the old dear next door must have called them literally the second the music started playing.

That was some decades ago now though, I doubt the cops are interested in coming out for that sort of nonsense nowadays.