A fun way is for those that haven't unfriended you on FB,instagram etc. is to wait until they post something you can counsel them on from the WT, such as violent sports, video games, concerts, clothing, or whatever it may be. They'll unfriend you real fast that way :)
Someone had posted about their favorite football team winning so i just quoted the watchtower about shunning competitive sports.......didn't take long to get unfriended after that lol.