If you haven't heard by now, the Steem sock puppet witnesses just deployed Soft Fork 22.8888 which freezes the stake of legitimate stake holders like Blocktrades, GTG, Roelandp, and others.
You can find the public source code here, if this is in fact what they are running.
The current users being blocked (as far as we know) are:
The operations being blocked can be found in this code, while it is C++ it is fairly easy to understand this piece even if you don't develop. Just look at the operation names.
As we have seen in the past with the censorship going on Steemit, this will likely just get worse. Currently there are like 20 censored accounts and 200 posts being censored on Steemit.
You can read about the Soft Fork 22.888 announcement here.
What is obvious now, nothing is out of the question under Justin Sun's regime.