Yeah, this is far from best practices...
I am disappointed, but this space has a very wild-west connotation to it. Everyone will try to protect their gains/situation as best they can and, in the case of Trex, they want to cover their regulatory-compliance ASAP, but they way they are going about doing it is less than ideal.
I definitely agree with what was said here that other exchanges should be expected to follow.
Have your own wallets folks!