Make them hard to find. But make them able to block the damage on planets where meteors consistently fall. Or raise the explosive resistance of certain kind of blocks to not take damage from Meteors.
This would be good because meteors are a pain to deal with,they just OBLITERATE EVERYTHING they hit.Even building slightly underground doesnt help i dont want to have to build my house far from the surface.
Actually now that I think about it, just create a block protection server program for player-placed blocks.
Blast rock and obsidian can already handle hits from asteroids. They require 2 hits in the same location inside a short time frame to break them. Those materials can be mined in great quantity on Threat Level 1 worlds. Volcanic World = nearly infinite obsidian
