Reduction of depletion planets for the non-Cravers based factions.

I played for United Empire, my neighbor was Craver. Turn 35: In my capital (4 Raia, 3 Hissho) appeared 1 Craver... and he began to deplete my planet!

For race who do not have mentality of devouring planets is absolutely illogical to allow this situation in its territory.

Perhaps it would be reasonable to set the condition "Cravers shouldn't deplete a planet unless they're at least 50% of it's population" or something like that?

Not native english speaker, apologize for possible errors.