The WH already has a list, remember ‘flagged@whitehouse.gov‘? That was just a piece of the puzzle.
If they didn’t shut down “allied” sites like DU, KOS or HUFF PO even they would have trouble....
A. Keeping up with the admin/mod work needed to compensate from messages in such a case from getting out/around.
B. They’d start losing segments of support.
Call me too optimistic but I would truly like to think that at one point that if our government was shutting down opposition even the left would say “Whoa, what are you doing? This isn’t America!”
I know perhaps there are always those that would turn in their neighbors and family members. I also like to think that rhetoric would never surpass action.