"Overwatch" by Florian Olivo
Detail from "Dada Scrabble" by Flickr userĀ romanlily
Rules:
1. No score-keeping.
2. Making up words is fine, as long as you create interesting definitions for them.
3. Starting new words that do not connect to other words is fine. That can be a good way to occupy unused board space.
It was the most fun I've ever had playing Scrabble, at any rate.