As I've mentioned before, music is capable of just about anything, and so are people. This is why it's always important to be in touch with your anger and to know how to properly express it through different musical means. People oftentimes suck, and you are morally obligated as a decent member of society to call out the offending party appropriately.
But how does one properly convey hatred with music you ask? Allow me to elaborate.
There are several things you can do. Personally, if somebody does something to piss me off, I feel compelled to tell them how much they upset me. I often do this by giving them a store-bought copy of the most recent Nickelback album. Say I hand you a copy of Silver Side Up; this is me telling you, "hey, you are such a douche that I paid $13 to get you a F*ck Off card for your birthday. Enjoy."
You can also tell how angry I am by how many CDs I give you. If I were to give you their entire collection of recorded works, you should start getting your affairs in order: say farewell to loved ones, etc.
But again, that's just me. You can find any number of ways to lyrically express your own physical disgust with someone's actions.
A more time-consuming option is to write a song. Everyone thinks they can play guitar anyway, so just watch "The Wedding Singer" a few times and make sure to pay attention to his song, "Somebody Kill Me Please." Now that's how you write a break-up song.
Remember in the movie "Say Anything" when John Cusack stands outside that chick's window with the boombox blaring that Peter Gabriel song? Seems to me like that is pretty ripe with opportunities. Assuming you could find a classic boombox (your iHome just wouldn't have the same effect), it's time to make a mix tape of songs by Hinder and Buck Cherry. Few things can communicate hate like making somebody listen to either of the aforementioned bands.
Let's assume for a moment that you are in a bar-type setting. Some random Bro J. Simpson indiscriminately knocks your drink out of your hand while on his way to hit on some bleached blonde little number at another table. He fails to acknowledge his mistake by means of apology or otherwise. I'll tell you what: you have found yourself a perfect candidate to which you can express your distaste for such classless acts of douche-baggery. Grab a few quarters from your friends Vera Bradley wristlet; you are going to the jukebox.
Pick something that let's Brohemian Rhapsody know that you mean business. "F*** All Y'all, Good F***ing Bye, F** You I'm Drunk, I F***ing Hate You," etc. You get the idea. When your selected tune comes on, walk over to said offender and let him know that this song is for him, from his parents. Hell, ladies if you want to play "Too Drunk to F***" by the Dead Kennedys and call him sexually inadequate, more power to you.
Somebody pisses you off. Question: Any chance you can get your hands on that person's iPod? If you are lucky enough to answer the posed question with an emphatic "yes, yes I am so fortunate," then aim to misbehave.
Remove the music from their library, and replace it with nothing but Christmas music. Or how about the Ghostbusters 2 soundtrack? Either one would suck, so they both serve the intended purpose of telling somebody, "Hey. I don't much care for you."
The possibilities are endless. As long as there are people, there will be people pissing off other people, so you might as well find a cultured, sophisticated means by which to exact revenge.
And although torture-a-la-Nickelback is about as sophisticated as playing lacrosse for Duke (too soon?) or waterboarding (yeah, probably too soon), it can give you comfort knowing that the unjust failed to escape your musically-inclined brand of retribution.
