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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.