Doable. But need $. It is restraining order not a lawsuit. It is harrassment basically if they send into your email inbox unwarranted. Same goes with robot calls, and it is hard to stop them not even with congress passing laws to deal with them. At this stage, we just have to ignore it. You might want to opt for text-based emails which wont trigger any html/css feedback to FB knowing you read it (maybe tutanota mail?)