I wouldn't be surprised, but I don't think this will have been at the direction of the US government, and not in a coordinated way. I would expect they have identified funds that have come from known hacks, and blacklisted them. But as I said, it wouldn't surprise me that much. If it hasn't happened already, it's going to. Only a matter of time.
I think it's one of the reasons why they have been so against some of the other crypto technologies like segwit and lightning. It removes them from the possibility of having that oversight role. I'm not the conspiracy type really, but it wouldn't come as a surprise that they have already had these discussions with regulatory authorities. Common sense really. The only real question is whether they have been encouraged to support or undermine technologies based upon those hypothetical discussions. They are who they are, and they work in that regulatory environment. It's not to be negative about them. They have a hand dealt to them, they play it.