Bad neighbors, please help!!!
I'm not sure where to post this but I need some help. I'm a master gardner and take pride in my yard. A young couple (with no kids) moved in next door two years ago and refuse to take care of their 1 acre yard. They have a battery operated robot thing that's supposed to cut their grass but it just makes a jog saw pattern in small spots. The flower beds are completely overrun and we've had more weeds, insects and disease in the past two years then ever before. I called the county on them twice last year and after a few weeks, they cut the grass but never the weeds. They grow through my fence all the time and start taking over my plants.
I've tried talking with them but they won't talk. They ignore us when we try to say something.
What else can I do? Is it bad if I spray my entire fence area with Roundup?
Here's some pictures I took this morning. The driveway with the basketball net is mine.