Sometimes I'll spend influence harassing the drones and graveyards on the first day or two. I'm not sure whether this is actually a good idea though, because graveyards seem to spawn a ton of angry monsters (including spectres and fire elementals) when they are damaged.
I'm curious whether harassing the corruption like this actually reduces the total number of monsters one has to deal with at night, or whether it isn't really worth the cost in ammo and chaos. What are the rules on monster spawns? Does it cost the drones anything?