First, exchanges voting with custodial stake without permission is completely unacceptable, in my opinion. People deposit coins on exchanges to trade, not to have the exchange make governance decisions for them.
Exchanges are typically not stakeholders of a chain, so they should not have influence in the governance of the chain, because their interests are not likely to be aligned with the chain's stakeholders and giving them influence only opens up an avenue of abuse, similar to what we saw recently by Binance.
Given the point above, it makes no sense to me that most informed voters would want to proxy their votes to an exchange, so I think that a plan like that proposed by CZ will only be used to take advantage of uninformed voters who don't understand the potential risks associated with giving power to the exchange they hold funds on.
I am utterly opposed to his suggested plan.
I'm glad you feel so strongly about this issue.
I think the Steem community should make this abundantly clear to Binance and all other exchanges that these proposals are completely unacceptable and will be vehemently opposed.
Thanks