This brings up a good point. Be prepared for a situation like this. Even if your radio set up is correct, your neighbors might not know where to get help to solve interference problems.
http://www.arrl.org/files/file/Technology/Neighbor_Info/Neig...
http://www.arrl.org/files/file/Technology/Neighbor_Info/Neig...
If you are a ham, the ARRL and other hams will help you work out a problem with a neighbor.