I'm thinking of waiting till my neighbors come home from work, and then I'm going to turn up the volume for my music as loud as I can
What's wrong with your neighbors, is it necessary to turn it up like that?
I want to annoy them with loud music.
You shouldn't disturb others with loud music. Neighbors are expected to treat each other with respect. If you anger your neighbors on purpose with loud music, they may retaliate in the same manner.
No biggie, it's just a little music. Nothing will happen.
Nothing might happen, but they can get really annoyed when they just want peace and quiet. Do you think you'd love it if someone waited for you just to annoy you? I think it's wiser to just enjoy your music with your headphones and ignore your neighbors.