I only have/had this problem in school, sometimes people would come in from the hallways listening to music or we'd get free time to relax and someone's volume would've been all the way up from before. I find it ridiculous no matter what the song/artist is and where I like it/them. It gives me major secondhand embarrassment, do that on your own time.
Oh god, yes. I hate when someone plays their music so loud in their headphones that everybody around them can hear it. It's extremely rude and annoying. Nobody wants to hear your music.
I'm very self-conscious about this and I always make sure that my music isn't being blasted in public as a courtesy to those who don't want to hear it.