Drunken suggestion:
Reverse-terraforming project. Can be used only on specific habitable planet types to quickly remove the maximum amount of resources from the planet. During a short period of time planet generate huge amount of production of food/organics/metal ore/rare metal ore/DEA depending on what resources planet has and regardless if mining and farming industries are present. Also generate huge money income from selling it's natural wealth based on planet type. Process can not be stopped. At the end planet change type to barren, loose all natural resources, including ore, rare ore, ruins, all of the atmosphere etc. Additionally planet get "pollution" and "wasteland" conditions. "Wasteland" conditions increase hazard and make significantly harder terraforming this planet into any other type. Optional, auto-abandon planet after that. Some factions can decrease rep with player after that (those, who cares of atrocity) but will not cause imminent hostility.