If a police officer came to your door to tell you that you were being too loud would you ignore them unless they had a gun pointed at you? I'm guessing that you wouldn't and neither would your neighbor. Almost no one would. Yes, crazy people do exist, but the overwhelming majority are not psychopaths who would shoot anyone who knocks on their door. Most people understand that if you shoot at the unarmed cop, you'll be quickly surrounded by large numbers of armed ones who will come to lock you away.

Very few people will choose to go to prison instead of turning down their music or calming down their guests.