Unless you're prepped and ready to find troll maps with very questionable mp3s in the background, it probably be better to deal with what we have.
I understand that you think you're looking out for other people, but the "people might troll with this content so it shouldn't be added" post is a terrible arguement. That logic could be applied to anything and, honestly, if people wanted to make stupid troll maps, the lack of custom music sure hasn't stopped them. It's simply the (small) risk you take whenever heading into multiplayer in these kind of games.
* A constructive post would be: "I think players might be able to troll with said content, how about adding an option to turn off custom music?"
I apologize if I came off sounding like a jerk. I hope you understand where I'm coming from.