That is... wildly incorrect for a lot of scattered reasons.
Do the game theory on it and show me how it would actually happen.
The generic possibility of such a thing happening is pointless compared to materializing in reality.
First of all: who benefits from the scam? It's it's like 10 or 20 accounts it won't work. Too many stakeholders would oppose it. Then we have to consider that the value of Hive will collapse to zero which is a bigger loss than any possible gain from the scam. Then we have to factor in the idea that systemic failure will just lead to another hardfork were all the attackers lose their money permanently.