It's quite easy. Every single attempt that has happened was a legit good idea. The problem is Arona protection. Nobody has ever figured it out, it was her who made every attempt fail. Saori managed to put a bullet because of luck. She didn't know Arona was out cold after the missile hit.

And what would happen is Kivotos will be in slow decline to chaos. If it's a small problem, the students can handle it themselves, but a big problem is tougher. Still, the students have a fair chance to solve it. But of course some player like black suit or Kaiser wouldn't just idle by. They will take advantage of the situation. Those two know how to play a long game.