If he is able to powerdown, he able to move the stake to a new account and vote. The stake was promised it would not vote based on the founders. That is fraud and I don't see why we need to let fraud have a chance at destroying the chain.
If I created a coin, premined most of it into existence for myself, then let others start to mine it. To help the price one could have made all these promises what that the token wouldnt be used to vote or destory the system. People invest based on that word. If I was then to go back on my word that would be fraud with the possibility of jail time.
This is very black and white. The founders stick to their promise or they are frauds. They didn't stick to it, so here we are.