I just had an idea, thinking about how a ragtag band chaos-scum could bring death and destruction to the Imperium of the Corpse God.
This requires them to have some opportunity for space travel, be that their own ship, or other means of travel.
Let's assume they want to only wreck havoc on a planet, no raid it, not conquer it, just causing anarchy and instability, to force the Imperium/Loyalist SM to deploy forces, that could maybe weaken another battlefield in the favour og the troup/their allies/whatever.
Could one 'harvest' Ork-spores and release them on another planet?
Is this semi -ingenius or fully retarted?