I was trying to quietly listen to 2 new cds on my back porch yesterday. I have speakers all over the house, so music's never loud. However, my neighbor was blasting a boom box while working in his yard yesterday, so I couldn't hear my new cds (property line is about 50' away from my porch)! I had to turn up my stereo and bring the kitchen speakers closer to the porch to hear my own music. When I was outside swimming, I could hear his music all too well. I had company over later, and just turned mine up enough so that we could hear mine. Amusingly, when his wife got home, she must have told him to turn it down as it got quite quiet.
I did resolve to get porch speakers so that I can quietly listen while out there and have been researching speakers and wire. I may also get speakers for the pool if I like the porch ones. I have enough speakers and a powerful enough system to blast the neighbors away, but would not do that; my previous house was a town house and I found lots of speakers used quietly worked well with close neighbors. I get along OK with this family but my house was vacant for a couple of years and I think that they're kind of used to having the area to themselves. They built several structures on county land next to theirs -- big sense of entitlement.
What do you do with neighbors who blast music?