I like the option to disable fire/explosive worms, as they often cause very large forest fires that you can't do much about. However, I would greatly appreciate being able to disable the fire/explosive spitters as well, since they also cause such forest fires. I love the explosions, but the fires they create get really out of control, and often I feel penalized for misstepping in the direction of a forest with a fire spitter or worm attacking me, causing my poor, irreplaceable trees to die. I'm on deathworld, so I need these trees to survive! Please let me know if you could implement such an option.

Sincerlely,
not Lorax

I don't know how it's set, but if you use Alien Biomes it might limit these enemies to showing up in volcanic and non-forested areas. If not, that would be a cool change perhaps: if they show up particularly in hot and dry environments: volcanic, desert, and the like.