You can't change consensus on a whim. Standardness filters don't work. But even if they did, Bitcoin Core does a release once every six months and people can take years to upgrade. Spammers can adjust because the release is even out. So for all intends and purposes these filters are static.

Now you add a privileged public key to each that accepts new filters in real time. Then they wouldn't be static. And then OFAC asks for the corresponding private key.