Making an example of a family member is crass to put it mildly, we have a basic principle in law that collective punishment is right out. So we don't punish you for your brothers crimes and so on. To punish a partner for some perceived slight when the principal agent is not charged with anything is something that I have a hard time imagining even today, in a former Soviet Union or affiliated country I could see something like that happen but this being the partner of a member of the press it seems like a spectacularly bad move.
Greenwald has basically been provoked into doing as much damage as he can do, likely he'll reveal more rather than less now. They have taken the gloves off against the one party that was still showing some restraint here.
Interesting how places like CNN don't cover this.