This was always a sore subject for growing up as a Witness. I remember meetings and Watchtower studies on the topic of music. The Witnesses answering during this part outed themselves as ROMs.
ROM was a term I came up with when I was a practicing Witness. Righteous Over Much. These Witnesses would share stories, naming specific bands or musical artists they no longer listen to because a song or album violated Bible principles or was demonic in nature. I could see the elders handling these parts trying their best to hide their cringing expressions as in the end it was all a "conscience matter".
Then there were those crazy ROMs who proclaimed all "worldly" secular music was wrong and professed they only listened to Kingdom Melodies. I wanted to reply with - "Listening to Kingdom Melodies outside of sanctioned theocratic events is disrespectful holy songs. It would be considered extra-theocratic activity. Like all extra-theocratic activity, it will lead to apostasy." The best response to a crazy statement is an even more crazy statement.
"You still believe in the moon landing?"
"Pfft! You still believe in the moon?"