Is there a way to reduce planet quality in Dread Lords?
For example, I don't want to bother colonizing planets with PQ < 9, but I also don't want the AI to settle on a planet within my border. Is there a way to reduce the PQ of a planet to 0?
Currently, I'm just constantly reinvading with invasion options that reduce PQ until it finally drops to 0, but that also means I'm constantly going to war.