if someone buys a majority stake from exchanges to control witness votes, will the current cabal treat them as hostile and freeze their assets? This is a very important question.

I would not. And after this, I think a good idea would be to reduce the number of witness votes each account has to 10. That way, it would take a lot more for one buyer to be able to fully control the chain.

Thank you for your input, it's really useful to hear what community members think.