DO NOT WAIT FOR THEM TO COME TO YOU
Working to address the concerns of neighbors is one of the most critical aspects of effective TNR. It is important to be proactive and recognize that just because you love the cats, does not mean your neighbors will too. Your neighbors have a right to enjoy their property free of cat poop and pee. The County recognizes this and will assist your neighbors in trapping "your" cats if they are on your neighbor's property. The cats will be taken to the shelter and euthanized. Just as tragically, this will create a serious divide between you an your neighbor with emotional distress for both of you.
Do not let the situation deteriorate to this point. Be proactive and talk with your neighbors about your colony management plans when you first start caring for the cats. Check in with them every couple of months. Listen to and address their concerns. Be prepared to spend some money on things like CatStops and car covers to address any concerns they have. These things are a lot cheaper than the cost of bailing "your" cats out of the pound.
Think of it this way. How happy would you be if your next door neighbor was feeding vultures? The vultures are wild and not owned by your neighbor just like your feral cats. She loves them dearly. Only problem is, they won't stay in her yard, they poop in your yard, and scratch the roof of your car. You would have probably appreciated it if your neighbor had discussed this situation with you a while back when she first started caring for these birds and had offered to help you protect your property, wouldn't you?
Still having problems with your neighbors? Join the Caretaker Alliance. Membership is free and Laurel Cats provides free assistance to Alliance members in helping to resolve the concerns of neighbors.