I don't like this news. From what I know OKex doesn't handle fiat, so they should not necessarily comply rules.
On the other hand, it can be a method to avoid hacks/hackers get use of stolen coins, if the other exchanges also comply.
I don't like it either, they are really on war and the casualties are holders and supporters of these Privacy coins, I hope they are the only exchange that will do that, there are a lot of supporters of Privacy coins.
They have a point because they want transparency and you are right hackers can exploit it.
We all thought we are decentralized but these actions make us confirm we are not.