Does anyone have any advice on how to keep neighbors' cats from tresspassing on your property? We have asked them nicely several times and they say they will keep them in but sure enough, the next day they let them out again. The cats do damage to our gardens and we are getting very ticked off at them. Any Advice?

Boy, I am going to take the heat on this one but here goes. Live traps, relocate.
I had the same problem. If they are coming to do their business in beds or garden, you can try red pepper sprinkled liberally in these areas (repeat after a rain). My neighbors never fixed or gave any cats shots so we had males spraying everything, etc. The last straw was spraying my new Mustang's wheels. Bye bye kitty.

What damage are they doing?