Guys, this is reminding me of how the Jews and the Gentiles argued over food sacrifice. The Jews would rebuke their Gentile Christians for eating such foods because they have been offered to idols. The Gentiles, on the other hand, argue that since idols are not real it really shouldn't matter. Of course, this isn't a food issue but what I think Paul talks about applies here:
1 Corinthians 8:7-13
But not everyone possesses this knowledge. Some people are still so accustomed to idols that when they eat sacrificial food they think of it as having been sacrificed to a god, and since their conscience is weak, it is defiled. But food does not bring us near to God; we are no worse if we do not eat, and no better if we do.
Be careful, however, that the exercise of your rights does not become a stumbling block to the weak. For if someone with a weak conscience sees you, with all your knowledge, eating in an idol’s temple, won’t that person be emboldened to eat what is sacrificed to idols? So this weak brother or sister, for whom Christ died, is destroyed by your knowledge. When you sin against them in this way and wound their weak conscience, you sin against Christ. Therefore, if what I eat causes my brother or sister to fall into sin, I will never eat meat again, so that I will not cause them to fall.
Replace food and eating with things like gaming, secular music, etc. Remember we all have different upbringings. Some of us didn't grow up in the church and some have been going to church all their lives. Ask the Spirit for discernment about these things. It isn't what goes inside us that defiles us but what comes out. If what you do causes some unbiblical behavior and viewpoints, then it'd be wise to stop. In regards to Christian music from questionable sources, you should exercise caution and do hear out people who have a thing or two to say. Of course the same should go for any and everything we consume, but also consider if what we consume is causing others to stumble.