The most effective way I know of is to move, change your number and ignore emails. One the extreme side, you may be able to file a restraining order? If your going to do anything considered apostasy, don’t get caught. I haven’t moved and plan on putting up Christmas lights and tree in window this year. Someone in my old cong is always in the neighborhood it seems. I haven’t been df’d or da’d but from hearing other’s stories, I know it’s a possibility. Mrs. Dazed thinks their too lazy here to care but we shall see.
Good luck.