If it is at all possible, move! People like that are just naturally nasty and there's really not a whole lot that can be done about them. If you own the place or moving is just not an option, you can try hiding orogonite in your yard. It's a man-made resin that absorbs negative energy and retransmits it as positive energy. You can also try to bind your neighbors' nasty gossipy behavior. Just modify the spell written in my response to Carol from Stafford, VA.