I think it's unfair that our laws don't protect your private property. In addition, neighbors should understand that not all people like to breathe marijuana smoke. I hope you've talked to them about it… Sometimes neighbors do not realize that they can cause inconvenience to other people by their actions, but there are also those who believe that they can do anything in their backyard. By the way, you can suggest that they use other products containing cannabis -- for example, sometimes I use weed gummies for relaxation, I found them on weedsmart.net. They can replace smoking and are not as harmful to health as daily smoking of marijuana. If your neighbors switch to weed gummies, both sides will benefit.