Geez Brzilian, give the guy a break.
Unfortunately, there isn't a lot you can do to eliminate ambient noise from the neighbors, short of soundproofing YOUR house, which is an extremely expensive proposition.
One solution that might provide a little relief, although I'm not really sure it would be noticeable, would be to put white noise generators in your house. They make kind of a "whooshing" sound, like rushing water, and are commonly used in offices and sometimes big warehouse stores to mask noise.
You might try asking this question over in the Studio Design and Building Forum. There's some pretty sharp guys that watch that Forum and might have some other tricks up their sleeves.
What would probably work THE BEST, would be if you could remotely shut off their power every time they fire up.
Good luck working that one out.
