https://www.techdirt.com/articles/20191207/09310443515/dhs-sued-over-first-amendment-trampling-social-media-vetting-program.shtml

The DHS continues with its social media vetting program targeting foreign visitors despite questions about its Constitutionality and its effectiveness. Once a government agency decides to do something, it's difficult to talk it out of it, even if it appears to be throwing money down an unconstitutional hole.

That's not to say a government agency can't be deterred from doing something awful. It's just that deterrence seems to be more effective prior to deployment than after a program is already in place.