I like how the families and school are likely pissed about the sign almost crushing someone and causing destruction, but can brush off the fact that there are often two 8 meter tall girl's slamming around the school or even squirming their way through classrooms.
It's only through the magic of funny fan service manga haha that no one's ended up dead or seriously hurt when Chieri does stuff with the MC or somehow doesn't collapse a hallway when her ass gets stuck in the door. Not that I mind of course, but it's still ironic.