Once you have handed over the highest position in a guild to someone with a desire to harm it, not only do I not believe there is anything the game can do to prevent damage entirely, I do not think there is anything it should do. That's what's called "getting outplayed." Yeah, it sucks when it happens. I've been outplayed a time or two myself, and I was really upset. But that doesn't mean that anything the people who outplayed me did was wrong, or against any kind of rule.
But those who have been outplayed should have a recourse shouldn't they? If you make a madman your king and he starts to destroy the realm you can rebel against him.
