I think your approach is harsh and cold, but I agree with the general premise you are asserting. 

In a nut shell, Sun bought steemit inc, and yes that did include the ninja stake. Like it or lump it, thats his, and however ned operated, or whatever hand shake deal he had is not applicable to Sun. 

If we wanted that stake to be unable to vote, we should have codified that into reality, not trusted the key holder. 

In the end, I hope the witnesses see that Sun wants this to succeed too. Help him, help Steem.