Signs point to seriously are you that dumb

A week ago I caught my neighbors at the far back of my property teaching one of my livestock guardian pups to get under my fence for treats so they could pet her. A 30 year old gal, who comes to visit her parents. I asked them wtf they were doing? Why they remotely thought it an okay habit to teach anyone's dog. They said it's my fault for having a friendly dog. I told them if they put their hands through the fence and got bit, I'd be the jerk with an aggressive dog, so now I'm the jerk with a too friendly pup? My other dog was standing back several feet barking at them to get off the fence, the friendlier one was already under the fence being lavished by the gal. I told them they have probably ruined my dog by teaching it a very hard to break habit. So, I had to add a low strand of electrified barb wire. Told her do not look at, call, or pet any of my animals. Her dad tells me, well you better lock up your dogs at night because they will just get under again. That's when my dogs do most of their work, so I told him to piss off. The next morning I went out to the pasture and sat up on the adjacent hillside and watched the dogs to see if they tried and get shocked back into the pasture. Well the lady pulls up in her car, as soon as my one pup hears her car she goes running to the back fence, which tells me that she's been doing this for awhile. I sit and watch, the gal hops out of her car and beelines for the fence arms out to reach through and pet her again. Which has been posted for a long time "caution hot electric fence". So I jump up and yell at her to stop right there and to never ever try it again and that she knows they are working dogs in training. She spins around and runs to her parents house. With me yelling at her the entire time. I got a large bright yellow sign that I had to post on the fence right where she parks saying "livestock guardian dogs working do not disturb". I can not believe that I even have to post this. And my pup did hit the hot wire, got super shocked and ran back off the fence. It's so sad that people are so damn stupid and disrespectful to even have to yell at them to not do this and put up signage. I hope this works.