RE: Darthknight = blocktrades = alpha = ... so on.
I think I can answer that question sir. The primary concern of a witness is to secure the blockchain, produce blocks and make sure the assets of your stakeholders are safe.
If an outside threat attacks the blockchain, witnesses need to do everything they can to protect us from that.
As you may have noticed, there is/was an attack on the Steem blockchain.
If by any means necessary means that certain accounts need to be blocked for certain transactions, so be it.
It is the same logic the previous witnesses used to freeze an investor's fund. Dpos (I know its a bitch) gives the power to the ones with the most stake, in this case JS. So if our biggest stakeholder believes these actions need to be taken to protect your, mine and everyone's interest in this chain, he can choose to vote for witnesses who are willing to go that far.
If elected witnesses believe the threat is severe enough to justify these account restrictions, they can run this code. Dpos, again.
Can you show me some examples of this attack?
There are too many examples, not going to waste my time proving you what is the right thing.
But here is 1. How secure is it to run a witness node that runs a version that can completely break the chain? They HAD to be removed, preventing certain transactions from these whale accounts helped to make the chain more secure. But you likely dont get that.
Do you have to freeze user account to remove him from witness?
Serious question, are you looking for answers or are you trying to just make arguments to corner people? If its the former i apologize. I just couldnt tell from the way you engaged in these conversations. Seemed like you already had a conclusion in your mind and aren't open to other people's ideas. Again, its just my observation.
This is spot on - thanks for explaining far better than i could have.