It was yelled loudly at me two universes ago that underground buildings aren't an exploit. So I while I agree it is an issue, I don't feel like repeating everything I said back then.
Just read the old thread I made: (Bug report) Underground Buildings Exploits
What is the name and ID of the building blueprint? Who designed it?
Just read the old thread I made: (Bug report) Underground Buildings Exploits
What is the name and ID of the building blueprint? Who designed it?