Ragnarok-proofed, they are XD Although, these are used in a succession game that is now at Year 7 (I think?) and I personally managed to build a stable fort during testing without even having to turtle much, so they *can* be weathered.
Honestly, I give 80% of the credit to SA for coming up with the concept; all I really did was translate it to .34xx and add a SPECIAL SURPRISE in a brief fit of gleeful malice.
8D You're now on my list. The Fun one.