Amatur architect says that an immovable rope should be enough for most buildings, if you design with that in mind.I'd want it to cover the full width of any given load-bearing element whenever reasonably possible, just to make sure a pillar doesn't, say, pivot around that rope as part of buckling in a collapse. Leaving the reinforcement seals inactive most of the time makes sense, though - just bury movement-activated MARS triggers inside sub-basement walls, each linked to the 5SB or alarm system directly above it and to the next detector clockwise around the perimeter.
The hokage tower might be a different story, but that's because it's height/weigh would take a different setup to avoid the pillar breaking on when pressed against a narrower "foundation". Maybe just set up ropes on every story?
Mind we can't actually do any of this, because it would destroy MARS OpSec.
Loseing ~exclusive MARS access would weaken us, and if counter-seals are invented it could be fatal.