I decided to play a mostly hands-off game, to try to tease out an interesting way to use DW. So I chose the Dhayut (love those warriors, and the general distaste from other races). I controlled by ship designs, and I could give orders to one planet per year, no more than 4 ships at a base and one at the planet. So I sat back to see what would happen.
My first year's order is to build four scouts, and a colony ship. The scouts are finished quickly and zoom off to explore.
Quickly the AI pisses off most of the neighbors with spies, and gets into a local war, but that's OK. "I" am winning the war, more or less, although mostly just noodling around as the AI does.
One of my automated explorers finds the Desolation Moon! Interesting. And lo! My AI sends out a repair ship to work on it!
The war ends with me up two planets. Another minor war begins.
The Desolation Moon is finished! Hmm, means I should easily win the war, right? Well, no -- it jets off into the enemy rear, and starts blowing up planets! Boom! Woo... neat effect. Now it occurs to me wonder how the galaxy likes me doing that -- seems like it might annoy them. Check diplomacy... and I was right. Everyone is sour on me. The Moon keeps going. Boom! Another planet. Everyone dislikes me. Boom! War declared. War declared. Boom! Boom! Soon I am at war with half the galaxy. The Moon keeps rolling. Targets everywhere! Let's blow up a gas mine, good idea!! Now another planet. Boom! War declared. War declared.
Soon I am hated as the ultimate evil by everyone in the galaxy, with negative modifiers in the hundreds down to below -200, IIRC. Every other empire is at war with me.
I give up on the game, but I follow the Moon to see how long it can run. Eventually it stupidly charges a large starbase with two defensive bases, and gets whacked.
Moral of the story: do not let the AI control the Desolation Moon.