Issues with the Neighbors

One of my neighbors leaves trash in the common hallway all the time. I never knew which one it was until I noticed a Zappos shipping label on top of one of the boxes piled next to the trash chute. It was apartment F, two doors down from me. I moved the trash in front of their door. I imagined this story would end with me cleaning trash off my door or out of the carpet in the common area, but they actually got rid of it. They must have seen the incriminating shipping label and been embarrassed. A much larger problem is my other neighbor who, in the past month, has really gotten into mixing his own techno music. He plays it at very high volume for an hour or so each day while he works the turntables. I have yet to come up with a way to shame him into giving it up.