Loud music is ok if it really doesn’t bother others, but too many people think they are in self-contained bubbles when they really aren’t. Many detached houses have little space between them and next door, for instance - even with the windows closed noise travels in the same way as it does from parked cars. If a house is in its own grounds, fair enough. On a housing estate, however, the chances are that loud music will bother the neighbours.
Loud music when driving on a motorway is one thing, as the speed and sound of whizzing traffic deadens the sound, but playing it when driving through residential areas, in parked cars, the dreaded workmen’s radios, and loud music at barbecues-all require consideration for others.