In my opinion, playing music in the lobbies is fine, as long as no one is getting a headache from it. Or you stop playing when asked to. That also applies to people making obnoxious voices(I still don't get the "fapping noises", some people...), but let's not drift away from topic.
Because it's always funny when someone pops in a elevator music there, mocking the the lobbies. It's nice to hear an old 80s song, at least a fragment of it(playing songs from beginning to end is usually obnoxious.). My spirits are high up when someone plays Flight of the Valkyries. Hell, even I play some harmonica for poops and giggles of it(playing the blues is not really known for that, but oh well, you get my point.)
But "spreading music in lobbies" doesn't really seems, umm, pleasant. I can feel a lot of headache coming out of that statement. But if you ask them to stop, surely they will. Right? Riiiiight? Because a lot of people seem to be skipping this protocol, being block-happy... I've seen people say, I blocked you and reported. Even quite high level players. Without a single warning, a single word. That doesn't seem right to me as well.
So what I'm saying is(god I rambled a lot again), with mutual understanding and communication, annoying cases of music would decrease, hopefully. But if we go ahead and block them, without a warning and go "I blocked you, meh meh." like a little child, we can't make progress on that front :3