Started off our October "Ghosting" my son his girlfriend and her two year old son.
We had never heard of ghosting until moving into our neighborhood about 4 years ago and we got ghosted. It's called "You've been Ghosted" or "You've been Boo'd". There's a bunch of websites that explain it, but basically it's putting together a basket of some sort containing little Halloween treats and assorted items like candles, and other simple Halloween decorations. Then you place it on their doorstep, ring the bell, and run like hell. There's a little poem that wishes a Happy Halloween and explains to the recipient their job to make up two baskets then "ghost" their neighbors. There's a little ghost image that gets taped to your front window or door so you don't get re-ghosted. Nice little neighborly gesture for the holiday. We always put little blinky lighted things in our basket because it looks so cool for the little ones to see at their doorstep.